Grading is the market
A card's value depends overwhelmingly on its condition grade, assigned on a 1–10 scale by a grading company — PSA, BGS or CGC — which encapsulates the card in a sealed, serial-numbered holder.
The pricing effect is extreme and non-linear. A card worth £200 in grade 8 might fetch £900 in grade 9 and £12,000 in grade 10. Centering, corner sharpness, surface gloss and edge wear at a level invisible to the naked eye determine which it is.
This means the grading companies effectively create value, and their consistency, backlogs and pricing decisions move the entire market.
Population reports
Graders publish how many examples of each card they have certified at each grade. A card with a population of 12 in grade 10 is genuinely scarce; one with a population of 4,000 is not, however old it is.
Experienced buyers check population reports before price guides, because population only ever grows. A card that is scarce in high grade today may not be in five years if unopened product still exists.
The 2020–21 bubble
Lockdown boredom, stimulus money and a wave of speculative interest produced a genuine mania. Sealed boxes of Pokémon product sold for many multiples of issue price, graded cards set records almost weekly, and card grading backlogs ran to a year.
The correction from 2022 was severe — many cards fell 60–80% from peak — while the very top of the market held up better. Both the run-up and the fall were faster and larger than in any other collectible category, which is what you should expect from an asset with no income, a young buyer base and extremely low barriers to speculation.
Sealed product
An unopened box carries optionality: it might contain a high-grade chase card. Once opened, that optionality is gone. This produces the strange situation where sealed product is worth more than the expected value of its contents, and where the act of opening destroys value — the collectibles equivalent of a time premium.
How you would actually trade it
Buy graded for anything valuable; buy raw only if you can grade accurately yourself, and understand that submitting cards costs money and takes months with no guaranteed outcome.
Use eBay completed listings rather than asking prices for valuation — the gap between the two is routinely enormous.
Verify slab serial numbers against the grader's online database. Counterfeit slabs containing re-graded or fake cards exist and are a growing problem at the high end.
What goes wrong
- Extreme volatility. 60–80% drawdowns have happened recently across much of the market.
- Grading risk. A submission that comes back a 9 instead of a 10 can cost you most of the expected value.
- Population growth dilutes scarcity permanently.
- Counterfeit slabs and trimmed cards — trimming to improve centering has produced significant scandals.
- Fashion dependence. Values rest on the cultural relevance of the underlying franchise.
- Storage. Heat, light and humidity degrade cardboard.
This entry describes how a market works. It is not a recommendation, a price forecast, or advice about whether this belongs anywhere near your money. How entries are written.