What is my card collection worth?

It is the first question anyone asks after opening a box in the attic, and it is also the one whose answer is most often misunderstood. "Value" is not a single number: it changes depending on what you intend to do with it. The same collection can be worth €2,000 or €900 depending on whether you are insuring it or selling it tomorrow.

Market price is not sale price

This is the distinction that matters more than any other.

The market price is what you see in catalogues and trackers: the average of recent sales for that card in that condition. It is the right number for estimating an asset, insuring a collection, or working out whether a purchase is reasonable.

The realised price is what ends up in your pocket. Between the two sit, in order:

• platform fees, typically between 5% and 10%;
• shipping costs you cannot always pass on to the buyer;
• time: common cards can sit unsold for months;
• the bulk discount, if you sell everything at once to a shop: normally between 50% and 70% of market price.

An honest rule of thumb: if you want to liquidate quickly, expect around 50-60% of market value. With time, selling card by card, you can approach 80-85%. Nobody gets 100%, because that 100% includes the seller's margin.

Condition matters more than you think

On a common card, the difference between "as new" and "played" is a few cents and changes nothing. On a rare, sought-after card the same difference can be half the value.

The scale used almost everywhere, best to worst, is: Mint, Near Mint, Excellent, Good, Light Played, Played, Poor. The most economically violent jump is between Near Mint and Excellent, because that is where a demanding buyer stops being interested.

Two systematic mistakes, both very common:

1. Overrating your own condition. Almost everyone grades their cards one category above reality. A card kept in a binder for twenty years is rarely Near Mint: check all four corners and the edges against the light before deciding.
2. Ignoring centring. A card with visibly off-centre artwork is worth less even if it is perfect in every other respect, and it will never pass a high grade.

Value is not evenly distributed

In almost every non-professional collection the value is extremely concentrated: 5-10% of the cards account for 80-90% of the total value.

This has an important practical consequence. Cataloguing 4,000 commons worth 5 cents each takes days and moves the total by a few tens of euros. Identifying the 50 cards that matter takes an afternoon and gives you almost the whole answer.

Start with: rares and ultra-rares, holos and reverse holos, first editions, cards from sets before 2005, and any card whose name you recognise even without being a player.

What moves prices up and down

Card prices are not stable and do not rise by definition. The factors that actually move them:

• Reprints. This is the biggest risk for anyone holding as an investment: a reprint can halve a card's price within weeks.
• Competitive playability. Cards that are strong in active formats are worth a lot and collapse when they rotate out or get banned.
• Nostalgia, which moves slowly and fairly reliably: the sets people opened as children rise when those children turn forty.
• Certified scarcity. The number of copies graded highly by PSA or BGS is public, and drives the price of collectible pieces more than the rarity printed on the card.

How to get a reliable number

The method that works, in order:

1. Separate potentially valuable cards from the rest, using the criteria above.
2. For each one, identify the set and collector number. The name is not enough: the same card can have dozens of printings at very different prices.
3. Assess the condition honestly, preferably in natural light.
4. Take the market price for that specific printing in that condition.
5. Apply the realisation discount if your goal is to sell.

Step 2 is where most people go wrong. A name alone does not identify a card: in this site's catalogue a single search by name can return dozens of genuinely different printings, each with its own price.

Tracking over time

An estimate made once ages quickly. If the collection has a value you actually care about, it makes sense to record it once and then let the prices update themselves: that is exactly why this site's collection tracker exists, with prices refreshed daily and history so you can see the trend rather than a single number.

The value that matters is not today's, but the curve.