TCGplayer market vs eBay sold: which price should you trust?

Trust TCGplayer market price for a raw, Near Mint, English card that sells at least a few times a week. Distrust any single number for a card that sells a few times a month. Use eBay sold listings, read by hand, for graded cards and for anything TCGplayer does not list. That is the whole answer; the rest of this guide explains why we built the site on the first number, where it breaks, and how to check a price yourself in a couple of minutes.

What TCGplayer market price is

TCGplayer's market price is a figure derived from recent completed sales of that card, in Near Mint condition, on TCGplayer's own marketplace, and it is published separately for each printing: Holofoil, Normal and Reverse Holofoil where they exist. It is not the lowest listing, it is not an ask, and it is not what a seller hopes to get. It is a summary of what buyers actually paid recently, which is the only thing a "price" should mean.

That gives it two properties we care about. It moves with real transactions rather than with listing behaviour, and it is anchored to a defined condition, so a played copy can be adjusted from it rather than guessed at.

Why it is our baseline

We pull TCGplayer market prices through TCGCSV, refreshed once a day around 20:00 UTC, for every card and sealed product in the catalog. Every Deal Score on this site is a comparison against that number, adjusted for condition, and nothing else. A seller's own "was $X" strike-through is ignored entirely. eBay listings, by contrast, are live asks: we pull them through eBay's official Browse API every 15 minutes, and an ask tells you what someone wants, not what the card is worth.

Using one baseline everywhere has a cost, which the rest of this guide is about, but it has a large benefit: the same card compared the same way in every listing, so a score of 80 on one card means what it means on another. The methodology page lists every rule.

The ten-sales-a-month rule

TCGplayer's own price-trend analysis only counts cards with at least ten sales a month. That is a useful confession from the source itself: below roughly ten sales a month, the market price is built on too few transactions to be treated as a fact. A card that sold three times last month, once to a buyer who overpaid, has a market price that is largely that buyer.

Most of a modern set is thin by this standard, and it does not matter much, because most of a modern set is worth cents. Here is how Pitch Black breaks down today.

The median card in the set is about a quarter. The cards where a bad baseline could cost you money are the handful at $10 and above, and those are usually the liquid ones, since they are the ones people search for. The dangerous middle is the card at $8 to $30 that is not a chase card: rare enough to be thin, valuable enough to matter.

What the valuation apps get wrong

Independent tests of collection-valuation apps such as Collectr and PokeData found their valuations running about 6.5% above actual sale prices on the median card, and diverging by as much as 2.5× on thinly traded cards. The median error is a rounding problem. The 2.5× is the problem that matters, and it shows up exactly where the ten-sales rule says it will: on cards without enough recent sales to pin a price. Any tool that prints a value for every card in a binder is printing guesses for most of them, and a "deal" that is 40% below a guess is not a deal. We do not use app valuations for anything, and we would suggest you do not compare eBay listings against them either.

What we do not have: eBay sold prices

eBay's completed and sold listings are the best public record of what graded cards sell for, and for many cards the deepest record of raw sales as well. We do not use them, because eBay does not expose sold-listing data through a public API. We could scrape it; we would rather not build the site on something that can be switched off, and we would rather not present numbers we cannot refresh reliably.

The main thing this costs us is graded cards. A PSA 10 does not have a TCGplayer market price, and comparing a slab to the raw Near Mint figure produces nonsense in both directions. So graded listings appear in our results but carry no Deal Score, and will until there is a graded baseline we can maintain honestly. It also means that for a raw card TCGplayer does not list, or lists without a price, we have no baseline and show no score. If you see a listing you like with no score, that is usually why, not a bug.

Condition multipliers and the confidence score

Since the baseline is a Near Mint price, every ungraded listing is adjusted for the condition eBay records. We use eBay's structured condition descriptor first and title words only when it is missing: Near Mint at 100% of market, Lightly Played 85%, Moderately Played 70%, Heavily Played 50%, Damaged 35%, and 90% when no condition is stated at all.

Then every listing gets a confidence score from 0 to 1 that says how much we trust the comparison, and the Deal Score is scaled by it. Confidence starts from how the card was identified: a title with the set, the card number and the name matching a single card is the best case. It drops when the condition is unstated, when shipping is calculated and had to be assumed at about $5, when TCGplayer's own price spread for the card is wide, when the card is worth under $10, when the seller is new or has feedback below 95%, and when the title suggests a quantity greater than one. Below 0.5 we do not call it a deal at all. Confidence is our way of encoding the ten-sales rule and the app-divergence lesson into every score: the thinner and messier the comparison, the less the score is allowed to say.

How to sanity-check a price yourself

Take two minutes before any purchase over $20.

1. Open the card's page on this site and note the printing. A Reverse Holofoil and a Holofoil of the same card can have very different prices, and a listing title often does not say which it is. The photo does.
2. Look at the TCGplayer spread for that printing. When the lowest listing and the market price sit far apart, or when there are only a few listings, treat the market price as a range rather than a point.
3. Check eBay sold listings by hand for the same printing and condition, ignoring lots, graded copies and code cards. If the last several sales cluster around the TCGplayer figure, you have two independent sources agreeing. If they do not, the card is thin or the market has moved since the last daily refresh, and the sold prices are the fresher number.
4. Remember that an eBay seller pays roughly 13.25% plus $0.30 per order in fees, an effective 15 to 16%, so fixed-price asks cluster at or just under market. A listing 12% under adjusted market is our minimum to qualify as a deal; a liquid card at 40% under deserves a second look at its condition and its photos before you assume you have found a bargain.
5. Paste the listing into Deal Check. It shows the landed price, the baseline used, the condition adjustment, the confidence and every reason confidence was reduced, so you can see which of the above is doing the work.

Bottom line

TCGplayer market price is the right baseline for raw Near Mint English cards because it is built from real recent sales, is defined by condition and printing, and can be refreshed daily for the whole catalog. It is a weak number for any card selling fewer than about ten times a month, which is where valuation apps go wrong by as much as 2.5×, and it is no number at all for graded cards, which is why slabs are shown but not scored here. We compensate with condition multipliers and a confidence score that shrinks any claim the data cannot support. For a card that matters to you, confirm the figure against eBay sold listings for the same printing and condition, and let Deal Check show you the arithmetic.