Union Arena Kaiju No. 8 vs Yu Yu Hakusho: Ghost Files booster box: which is worth opening?
Neither is worth opening at today's prices, but Kaiju No. 8 comes closer: its cards are worth 62% of its price after selling costs, against 53% for Yu Yu Hakusho: Ghost Files.
Side by side
| Kaiju No. 8 booster box | Yu Yu Hakusho: Ghost Files booster box | |
|---|---|---|
| Verdict | Keep it sealed | Keep it sealed |
| Box price today | $98€87 | $70€63 |
| Cards inside, after selling costs | $61€54 | $38€34 |
| Cards ÷ price | 62% | 53% |
| Boxes that lose money | 75 of 100 boxes | 84 of 100 boxes |
| A typical box (median) | $27€24 | $19€17 |
| Rarest pull | Alt-art parallel (★ / ★★): 66 of 100 boxes | Alt-art parallel (★ / ★★): 66 of 100 boxes |
| Packs | 16 packs of 12 cards | 16 packs of 12 cards |
| Released | October 31, 2025 | October 31, 2025 |
The two boxes
How we work this out
Both boxes are worked out the same way: today's card prices, selling costs taken off, and simulated boxes to see how often one loses money. Read the full method