HobbyCardIndex vs Mavin: 2026 Card Pricing Comparison
What both platforms actually do
HobbyCardIndex (HCI) and Mavin are both used by collectors looking up recent sale prices, but they sit in different categories. Mavin is a sold-listing search tool. You type a keyword string, Mavin queries recent eBay sold data, and you see a list of matching sales with an average and a chart. The product is general purpose by design. It works for trading cards, but it also works for vintage cameras, vinyl records, and most other collectible categories on eBay. The strength is speed and breadth. Type a string, get a number.
HCI is a card-specific market data platform. The center of gravity is the per-card page, where pricing is structured around a known catalog entry rather than a free-text search. A 2017 Donruss Optic Patrick Mahomes Holo Rated Rookie has a single canonical page on HCI, with per-grade comps for raw, PSA 10, BGS 9.5, SGC 10, and CGC 10, plus population counts where available, an index, a trend, and a dated quote. The strength is methodology and depth, applied to the categories HCI covers. Treating Mavin and HCI as substitutes underestimates both. Mavin is the faster keyword tool for a wide range of items. HCI is the deeper card tool for collectors who price, grade, or research cards with any frequency.
Mavin sits one step down-market from the subscription comp tools. For the broader taxonomy including CardLadder, eBay Price Guide, PriceCharting, and the grading-incentive ownership map, our independent pricing tool comparison covers the full alternatives field with dated pricing-creep notes.
Feature matrix
The table below summarizes the features collectors weigh when choosing between, or combining, the two products. Treat the Mavin column as directionally accurate as of ; subscription tiers, search throttles, and feature behavior on Mavin shift, and the public site is the source of truth. Verify before locking in a workflow.
| Feature | HobbyCardIndex | Mavin |
|---|---|---|
| Primary purpose | Card-specific pricing, per-grade indexes, grading decision support, research | General-purpose eBay sold-listing search across many categories |
| Form factor | Web-first card catalog, per-card canonical pages | Web-first keyword search, results-list view per query |
| Catalog | Roughly 7 million cards keyed by player, year, set, number, parallel | No catalog; results are derived from each fresh eBay query |
| Scope | Trading cards only, across sports and TCG categories | Any eBay category: cards, coins, comics, electronics, vintage, etc. |
| Sold-comp methodology | Sold-only, outlier trimmed, per-grade, dated, with sample-size flags | Aggregates recent eBay sold listings for the query, raw average |
| Per-grade separation | Yes, structural; raw vs PSA vs BGS vs SGC vs CGC each get a clean comp set | Not native; depends on whether your query string includes the grade |
| Parallel separation | Yes; Holo, Optic Silver, Prizm Silver, etc. each have their own page | Depends on the query string; risk of mixing parallels in results |
| Population counts | PSA and BGS pop counts on card pages where available | Not a feature; Mavin is a sales aggregator, not a pop-report tool |
| Editorial content | Hubs, guides, comparisons, long-form reports, FAQ pages | Light; product is search-led rather than editorial-led |
| Personal collection tracking | Paid tier with portfolio value, alerts, per-grade exposure | Limited or absent; product is built for ad-hoc lookups |
| Free tier | Per-card pricing, sold comps, sets, players, sport hubs, guides | Free keyword sold search with usage limits |
| Paid tier | Portfolio value, alerts, advanced analytics, drill-down | Higher search limits and historically ad removal |
| Best for | Card pricing, grading decisions, market research, sale timing | Quick keyword sold check on any eBay item, including non-cards |
The methodology gap that matters
This is the part collectors should think hardest about. A sold-comp number is only as useful as the methodology that built it. A research-grade card price needs sold-only filtering (asking prices and active listings excluded), outlier trimming (a single fluke high or fire-sale low pulled from the average), per-grade separation (a PSA 10 quote should not be mixed with raw or BGS 9 sales), parallel separation (a Holo, a Silver Prizm, and a base card are different items), volume awareness (three sales is not the same signal as forty), and a date attached so the reader knows when the number is from. Without those, the number drifts from useful to misleading.
Mavin's design is to query eBay sold data and return the matching listings with an average. That works as long as the query string is precise enough to isolate one item, one parallel, one grade, and exclude the auctions that did not actually sell. In practice, that depends entirely on what you typed. A loose query like "Mahomes rookie" will return raw, PSA 10, BGS 9.5, autos, parallels, and reprints in one mixed average that is not useful for a buying or selling decision. A tight query that includes the year, set, parallel, card number, and grade will work better, but the user, not the tool, is doing the methodology work. HCI does that methodology work upfront, structurally, on the card page, so the number you see is already trimmed, separated, and dated. For more on what a sold-comp methodology actually looks like, see How to Value a Card and What Is a PSA 10?.
Catalog vs no catalog
Mavin does not maintain a catalog. There is no concept of a canonical Patrick Mahomes 2017 Donruss Optic Holo card page on Mavin. The product is a search interface over recent eBay sold data, refreshed on each query. That is the right design tradeoff for a general-purpose sold-listing tool that serves many categories beyond cards, but it means there is no anchor for things like population counts, per-grade indexes, parallel families, set checklists, or per-card editorial. Each lookup starts from a blank query box.
HCI maintains a structured catalog of roughly 7 million trading cards. Each canonical card has a stable URL, a per-grade comp set, a parallel context, a population reading where available, a chart, and a place for editorial. That structure is what lets HCI publish set pages, player pages, sport hubs, and guides that all link back to specific cards. Mavin does not need a catalog to do its job, and HCI could not do its job without one. The two products built different infrastructure for different use cases. For broader exploration, see our Browse Sets and Browse Players pages, plus the sport hubs for baseball, basketball, football, hockey, soccer, Pokemon, MMA, and wrestling.
Per-grade pricing, in practice
Card pricing is grade-driven. The same Patrick Mahomes 2017 Donruss Optic Holo Rated Rookie can clear at very different numbers depending on whether it is raw, PSA 9, PSA 10, BGS 9.5, BGS 9.5 with sub-grades that hint at a Black Label crack-out candidate, SGC 10, or CGC 10. A pricing tool that mixes grades into one average understates the strong grades and overstates the weak ones. HCI separates pricing by grade as a structural feature of the card page. That is the same design philosophy behind our broader Raw vs Graded guide and our individual grader writeups for PSA, BGS, SGC, and CGC.
On Mavin, per-grade separation depends entirely on the query string. A search for "Mahomes 2017 Donruss Optic Holo PSA 10" will return tighter results than a search for "Mahomes Optic," but the user is responsible for excluding raw sales, BGS sales, SGC sales, autos, and parallel cousins. A collector who already knows the catalog and writes precise queries can get a usable number. A newer collector who does not is more likely to get a mixed average that does not match the card in hand. HCI's structural separation removes most of that risk, at the cost of being a slower, more deliberate tool than a free-text search box.
Scope: cards only vs everything on eBay
Mavin's general-purpose scope is a real strength when the item is not a card. A collector who also flips vintage cameras, deals in coins, or sells comic books gets one tool that works across all of those categories with the same query interface. There is no need to learn a different platform per vertical. For a generalist seller, that breadth is meaningful, and we are not going to pretend otherwise. HCI does not cover non-card collectibles and is not trying to. If your inventory is a mix of cards and other categories, Mavin or eBay's own sold filter is the right tool for the non-card half of the work.
The other side of that coin is depth. A general-purpose sold-listing tool cannot afford to build per-category methodology for every vertical it serves. HCI's depth on cards (per-grade separation, catalog, population context, editorial layer, indexes, alerts, portfolio) is the kind of thing that only makes sense if you specialize. Specialization and breadth are different products. If your work is mostly cards and you only occasionally need a sold check on something else, HCI for cards plus eBay's own sold filter for everything else is a workable stack. If your work is genuinely mixed across many collectible categories, Mavin's generality is a fair fit.
Cost and access
Mavin's free tier covers a meaningful slice of the experience, with usage limits that throttle heavy users and a paid tier that raises those limits and historically removes ads. HCI keeps per-card pricing, sold comps, set and player browsing, sport hubs, and the full guides and comparisons library free, and charges for portfolio value, alerts, and advanced analytics. Neither product charges for the use case the other is best at, so a collector who uses Mavin for occasional non-card lookups and HCI for card pricing decisions can do most of that work without paying either side.
Independence and ownership
HCI is independently owned. We do not operate a grading service, marketplace, breaking business, or card manufacturing line, and we accept no affiliate fees from graders. The structure is documented on our independence page. The reason it matters is that pricing data should not be entangled with the businesses that profit from price direction.
Mavin has historically operated as an independent search-tool product without a parent grader, marketplace, or auction house using it as a sales funnel. That is a similar posture to ours in a different shape: a small independent tool not owned by any of the side businesses that create conflicts. As always, ownership and partnerships can shift; if independence matters to your tool choice, check the current corporate structure of any product before relying on it. For the broader pricing-tool field, our Alternatives to CardLadder page covers eBay Price Guide, 130point, PriceCharting, TCDB, and several others in one place.
Tools beyond a sold-comp lookup
Quick keyword sold checks across categories
Mavin wins this without contest. Type a string, get a number, across cards and most other eBay categories. eBay's own sold-listing filter does the same thing for free; Mavin packages the experience more cleanly and presents an average and chart. HCI does not compete on this axis and is not trying to.
Per-grade and per-parallel pricing accuracy
HCI is the closer fit. Sold-only methodology, per-grade separation, parallel separation, dated quotes, and a catalog page that anchors the comp set. For broader background see How to Value a Card, Should I Grade This Card?, What Is a Parallel?, and What Is a Refractor?.
Grading decisions
HCI is the closer fit. The decision to send a card to PSA, BGS, SGC, or CGC is a per-card EV calculation that needs per-grade comps, current grading turnaround, and a realistic gem rate. Mavin's mixed-grade averages do not separate the math the way that decision needs. Our Should I Grade This Card? guide walks the framework end to end.
Alerts and portfolio tracking
HCI is the closer fit. Per-card thresholds, percentage moves, per-grade tracking, and portfolio-level value movement at the paid tier. Mavin is a search interface, not a watchlist or alerting product.
Authentication and counterfeit risk
Neither product is an authentication service. For collectors worried about counterfeits and trimmed cards, our Spotting Fake Cards guide covers the detection workflow and the trade-off between buying raw, buying graded, and submitting for authentication.
Who should pick which
| Collector profile | Recommended first | Why |
|---|---|---|
| Quick sold check on any eBay item, cards or otherwise | Mavin | General-purpose sold search across many categories, fast |
| Pricing a single card before buying or selling | HobbyCardIndex | Per-grade methodology, parallel separation, dated comps |
| Tracking a portfolio value over time | HobbyCardIndex | Portfolio, alerts, per-grade indexes at the paid tier |
| Researching whether to grade a card | HobbyCardIndex | Per-grade comps and EV math, plus our grading guides |
| Generalist seller across many collectible categories | Mavin | One query interface that works across cards, coins, comics, etc. |
| Vintage, oddball, or pre-war card research | HobbyCardIndex | Catalog and editorial coverage of cards that are query-fragile |
| Mixed workflow (cards on HCI, other items on Mavin) | Both | Specialization for cards, generality for everything else |
The table is a default, not a verdict. Most collectors who price cards with any frequency end up using a card-specific tool for cards and a general sold-search tool (Mavin or eBay's own filter) for the rest. The choice of which card-specific platform is a separate decision; see our HCI vs CardLadder, HCI vs TCDB, and HCI vs Cardbase pages for those comparisons.
What this page will not do
It will not claim HCI replaces Mavin for non-card lookups. A card-specific platform does not cover vintage cameras, coins, or comics, and pretending otherwise would push collectors toward the wrong tool for the job. It will not claim Mavin replaces HCI for card pricing decisions. A keyword sold-listing search returning a mixed-grade average is not the same as a per-grade methodology with parallel separation and dated quotes, and treating it as such would mislead a buying or selling decision on a card that has meaningful grade and parallel premiums. It will not quote a specific Mavin subscription price because tiers shift. And it will not push you to pay for HCI when the use case you have is a free use case on either side.
If you want a broader view of the pricing-tool field that goes beyond HCI, our Alternatives to CardLadder page covers eBay Price Guide, 130point, PriceCharting, TCDB, and several others in one place. For the K-shape compression context that informs how we read the current market, see the K-Shape Report 2026.