Is the Double Diamond booster box worth it?
A lottery — value in a few cards
The booster box costs €53.82 today (Cardmarket trend). 7 cards are worth €5 or more — €264.43 together, 4.91× the box price. The top five cards make up 79% of the whole set’s value.
How cards are priced
Most cards in any set are commons worth cents. Whether a box pays off depends on hitting one of the few top cards.
Most valuable cards in the set
Full set →| # | Card | Set | Price today | 30 days |
|---|---|---|---|---|
| 1 |  Omnimon BT1-084 | Double Diamond | €196.27 | -63% |
| 2 |  Sistermon Ciel BT6-084 | Double Diamond | €20.71 | +13% |
| 3 |  BeelStarmon BT6-112 | Double Diamond | €16.97 | -3% |
| 4 |  Impmon BT6-068 | Double Diamond | €8.92 | -15% |
| 5 |  Agumon - Bond of Bravery BT6-018 | Double Diamond | €7.83 | +0% |
| 6 |  Gabumon BT6-019 | Double Diamond | €7.11 | 0% |
| 7 |  Gabumon - Bond of Friendship BT6-030 | Double Diamond | €6.62 | -1% |
| 8 |  Sistermon Blanc BT6-082 | Double Diamond | €4.92 | -3% |
| 9 |  Eosmon BT6-086 | Double Diamond | €4.90 | -6% |
| 10 |  Alphamon BT6-111 | Double Diamond | €4.51 | -12% |
| 11 |  Agumon BT6-007 | Double Diamond | €4.49 | +10% |
| 12 | BeelStarmon BT6-112 | Double Diamond | €3.84 | -13% |
| 13 |  Jesmon BT6-016 | Double Diamond | €3.61 | +3% |
| 14 |  Morphomon BT6-047 | Double Diamond | €3.27 | -22% |
| 15 |  SkullGreymon BT6-078 | Double Diamond | €3.05 | -3% |
| 16 |  Titamon BT6-081 | Double Diamond | €2.74 | -12% |
| 17 |  Dynasmon BT6-044 | Double Diamond | €2.33 | 0% |
| 18 |  Gankoomon BT6-067 | Double Diamond | €2.11 | +8% |
| 19 |  Pulsemon BT6-033 | Double Diamond | €1.94 | -31% |
| 20 | Alphamon BT6-111 | Double Diamond | €1.12 | -10% |
Prices: Cardmarket trend, updated daily — as of Oct 30, 2026.
How to read these numbers
The full-set value is what all cards would cost as singles. One box won’t complete the set and the rarest cards are rare, so we focus on cards from €5. If they are worth many times the box price, the set is rich in valuable cards; if value is concentrated in a few cards (high top-5 share), opening is a lottery.
If you want a specific card, buying it as a single is almost always cheaper. A box makes sense if you enjoy opening, play limited/draft or collect sealed product.