News & methodology
How each price and screen is built, and dated market notes written from the catalog's own reads. Signals, not tips.
Grading ratio: what a PSA 8, 9 or 10 sells for against a raw copy, and what the multiple leaves out
Screen 7 divides each card's eBay PSA 8, 9 and 10 sales by its raw near-mint price. On 19 October 2026, over cards at $10 or more raw, the median PSA 10 sold for 6.5 times raw (867 cards), and a PSA 8 averaged below raw on 261 of 728.
CardGameInsight Desk · Oct 19, 2026 · 6 min read
Box EV: what a box is worth opened, from published pull rates and today's prices
Screen 6 sums each card's pull probability times its observed value into an expected value per pack, then compares it with sealed prices. Three sets have a published sample; opened value covers 7 to 36% of the sealed price.
Discontinued watch: out-of-print sealed product against the price it cost at retail
Screen 5 ranks out-of-print sealed products by how far above MSRP they trade, lowest first. Only six products have a retail price we can cite; here is why the other 78 are listed unranked rather than guessed.
Region spread: the same card in Sweden and the US, and what the gap does and does not include
Screen 4 puts the Tradera asking median next to the US market for 1,364 cards. The method, the two biases it states, the printing rule, and why nothing is subtracted for postage or tax.
Chase concentration: how much of a set is really three cards
Screen 3 measures the share of a set's total raw value held by its top three cards, plus a Herfindahl index. Black & White is the most concentrated seeded set at 73%; here is the method and the first results.
Drawdown vs population: a price fall is only a supply story if the supply actually grew
Screen 2 lists cards 30% or more below their window high, then asks whether the PSA 10 count rose in the meantime. With one population read the second column waits; here is why it is built that way.
Pop-adjusted value: what a PSA 10 costs per copy in existence, and why the slope flips by era
Screen 1 regresses PSA 10 price on PSA 10 population within each era. In the vintage era scarcity barely predicts price. In the modern eras the slope is positive, which changes what 'below the curve' means.
How CardGameInsight prices a card, and why one live read beats four estimates
Every price on the site is either an observed read from a named source or an estimate badged as such. Here is the rule that keeps the two apart, the day it mattered, and the printing mistake it caught.