Union Arena Kaiju No. 8 booster display$98today

Is a Kaiju No. 8 booster display worth opening?

Union Arena. 16 packs of 12 cards. Released 31 October 2025. Prices from 15 October 2026.

TCGplayer today

$97.82

Lowest listing
$89.70
Per pack
$6.11

Keep it sealed$61 of cards inside, after selling costs

Estimated contents: nobody has published measured pull rates for this box yet, so we use those of boxes with the same pack layout. Treat the numbers as a rough guide.

See the mathPrice history

Why we'd keep it sealed

The cards inside are worth $61 after selling costs. The box costs $98.

On average you lose $37 per box. Buying the singles you want is cheaper.

Pull rates are still uncertain. The real value could be anywhere from $34 to $115. That's enough to change the verdict.

If you opened 100 boxes

  • 25 make money
  • 75 lose money

A typical box is worth $27. 1 in 10 boxes is worth $172 or more, and 1 in 10 is worth $11 or less.

The math, per box

From the price of every card to what you'd actually keep.

Per box of 16 packs

Box price on TCGplayer
$98
Cards inside, at market prices
$93
Selling costs and bulk
−$33
Cards inside, after selling costs
$61
Compared with the box price
−$37

From 100,000 simulated boxes. Selling costs: 13% fee, $0.30 per card sold, cards under $1.00 go to bulk at $0.01.

Cards inside, at market prices
The average value of everything in a box, with each card at its price on TCGplayer today.
Selling costs and bulk
TCGplayer's fee and postage for every card worth selling. Cheap cards go to bulk for a few cents.
Cards inside, after selling costs
What an average box puts in your pocket once everything is sold.
Compared with the box price
Plus means the average box is worth more than it costs. Minus means it's worth less.

What the box costs

Today's price on TCGplayer, and how the box price and the cards inside have moved.

TCGplayer today
$97.82$6.11 per pack
Lowest listing
$89.70
  • Box price on TCGplayer
  • Cards inside, after selling costs
Box price and the cards inside, day by dayFrom 14 Oct to 15 Oct, the box price went from $98 to $98, and the cards inside, after selling costs, from $61 to $61.$40$60$80$100$120Box$98Cards$6114 Oct15 Oct14 Oct: box $98, cards $6115 Oct: box $98, cards $61Box price and the cards inside, day by dayFrom 14 Oct to 15 Oct, the box price went from $98 to $98, and the cards inside, after selling costs, from $61 to $61.$40$60$80$100$120Box$98Cards$6114 Oct15 Oct14 Oct: box $98, cards $6115 Oct: box $98, cards $61
On days when the cards line sits above the box line, an average box was worth more than it cost. Selling costs use our defaults.
Show as a table
DayBox priceCards inside, after costs
15 October 2026$97.82$60.50
14 October 2026$97.82$60.50

What 100,000 simulated boxes were worth

Every box is different. This is how the value of each simulated box came out, after selling costs.

Value of 100,000 simulated boxes75 of every 100 simulated boxes were worth less than the box price of $98.Box price $98Lose moneyMake money010203040$50$100$150$200$250$288+Boxes out of 100Under $18: 31 of 100 boxes$18 to $28: 21 of 100 boxes$28 to $38: 12 of 100 boxes$38 to $48: 7 of 100 boxes$48 to $58: 3 of 100 boxes$58 to $68: 1 in 89 boxes$68 to $78: 1 in 282 boxes$78 to $88: 1 in 1,111 boxes$88 to $98: 1 in 2,857 boxes$98 to $108: 1 in 442 boxes$108 to $118: 3 of 100 boxes$118 to $128: 2 of 100 boxes$128 to $138: 3 of 100 boxes$138 to $148: 3 of 100 boxes$148 to $158: 2 of 100 boxes$158 to $168: 2 of 100 boxes$168 to $178: 3 of 100 boxes$178 to $188: 2 of 100 boxes$188 to $198: 1 in 83 boxes$198 to $208: 1 in 137 boxes$208 to $218: 1 in 281 boxes$218 to $228: 1 in 408 boxes$228 to $238: 1 in 463 boxes$238 to $248: 1 in 427 boxes$248 to $258: 1 in 412 boxes$258 to $268: 1 in 455 boxes$268 to $278: 1 in 273 boxes$278 to $288: 1 in 296 boxes$288 or more: 2 of 100 boxesValue of 100,000 simulated boxes75 of every 100 simulated boxes were worth less than the box price of $98.Box price $98Lose moneyMake money010203040$100$200$288+Boxes out of 100Under $18: 31 of 100 boxes$18 to $28: 21 of 100 boxes$28 to $38: 12 of 100 boxes$38 to $48: 7 of 100 boxes$48 to $58: 3 of 100 boxes$58 to $68: 1 in 89 boxes$68 to $78: 1 in 282 boxes$78 to $88: 1 in 1,111 boxes$88 to $98: 1 in 2,857 boxes$98 to $108: 1 in 442 boxes$108 to $118: 3 of 100 boxes$118 to $128: 2 of 100 boxes$128 to $138: 3 of 100 boxes$138 to $148: 3 of 100 boxes$148 to $158: 2 of 100 boxes$158 to $168: 2 of 100 boxes$168 to $178: 3 of 100 boxes$178 to $188: 2 of 100 boxes$188 to $198: 1 in 83 boxes$198 to $208: 1 in 137 boxes$208 to $218: 1 in 281 boxes$218 to $228: 1 in 408 boxes$228 to $238: 1 in 463 boxes$238 to $248: 1 in 427 boxes$248 to $258: 1 in 412 boxes$258 to $268: 1 in 455 boxes$268 to $278: 1 in 273 boxes$278 to $288: 1 in 296 boxes$288 or more: 2 of 100 boxes
Each bar covers $10 of box value. Bars right of the line are boxes worth at least what you paid.
Show as a table
Box valueBoxes out of 100Result
Under $1831 of 100Lose money
$18 to $2821 of 100Lose money
$28 to $3812 of 100Lose money
$38 to $487 of 100Lose money
$48 to $583 of 100Lose money
$58 to $681 in 89Lose money
$68 to $781 in 282Lose money
$78 to $881 in 1,111Lose money
$88 to $981 in 2,857Lose money
$98 to $1081 in 442Make money
$108 to $1183 of 100Make money
$118 to $1282 of 100Make money
$128 to $1383 of 100Make money
$138 to $1483 of 100Make money
$148 to $1582 of 100Make money
$158 to $1682 of 100Make money
$168 to $1783 of 100Make money
$178 to $1882 of 100Make money
$188 to $1981 in 83Make money
$198 to $2081 in 137Make money
$208 to $2181 in 281Make money
$218 to $2281 in 408Make money
$228 to $2381 in 463Make money
$238 to $2481 in 427Make money
$248 to $2581 in 412Make money
$258 to $2681 in 455Make money
$268 to $2781 in 273Make money
$278 to $2881 in 296Make money
$288 or more2 of 100Make money

Where the value comes from

The average box, split by card type. Most of the value often sits in cards you'll rarely see.

Card typeHow many per boxAverage card after selling costsAdds to the box
Alt-art parallel (★ / ★★)1.1 per box1.1 per box$43.94$46
Super Rare6.0 per box6.0 per box$1.72$10
Common / Uncommon176 per box176 per box$0.02$3.93
Rare8.9 per box8.9 per box$0.01$0.09
Total$61

Chance of a big pull

How often a box has at least one of the rarest cards.

Show as a table
Card typeBoxes with at least oneOn averageBoxes for one specific card
Alt-art parallel (★ / ★★)Star-marked alternate-art versions of the set's cards, about one per box.66 of 1001.1 per box21

If card prices fall

Prices often drop in the weeks after a set comes out. This is the same box with cheaper cards and the same box price.

Card pricesCards inside, after costsCompared with the boxBoxes that lose moneyVerdict
Today's prices$61−$3775 of 100Keep it sealed
25% lower$44−$5481 of 100Keep it sealed
50% lower$29−$6996 of 100Keep it sealed
75% lower$14−$84more than 99 of 100 boxesKeep it sealed

Pull rates we used

Where each number comes from, and how sure we are. Sources checked on 14 October 2026. This box's own pull rates haven't been measured, so these come from boxes with the same pack layout, with extra uncertainty added.

Card typeHow oftenLikely rangeBased on
Common slots, 11 per pack
Common / Uncommon176 per boxPack layout
Rare-or-better slots, 1 per pack
Alt-art parallel (★ / ★★)1.1 per box1 in 2.2 boxes to 2.4 per boxEstimate, TCGTalk, Inuyasha (UE23BT) Union Arena guide: pull rates from 3 English boxes (48 packs)
Super Rare6.0 per box3.6 to 10.0 per boxEstimate, TCGTalk, Inuyasha (UE23BT) Union Arena guide: pull rates from 3 English boxes (48 packs)
Rare8.9 per boxThe rest of the slot

Most valuable cards

The 30 most valuable cards in the set, and what you'd keep after selling one.

CardCard typeTCGplayer priceAfter selling costs
Kikoru Shinomiya (020) (SR**)Alt-art parallel (★ / ★★)$188.67$163.84
Kaiju No. 8 (055) (SR**)Alt-art parallel (★ / ★★)$181.99$158.03
Mina Ashiro (005) (SR**)Alt-art parallel (★ / ★★)$155.02$134.57
Reno Ichikawa (012) (SR**)Alt-art parallel (★ / ★★)$139.16$120.77
Kafka Hibino (063) (SR**)Alt-art parallel (★ / ★★)$119.03$103.26
Soshiro Hoshina (071) (SR**)Alt-art parallel (★ / ★★)$115.71$100.37
Mina Ashiro (004) (SR*)Alt-art parallel (★ / ★★)$28.61$24.59
Reno Ichikawa (012) (SR*)Alt-art parallel (★ / ★★)$28.42$24.43
Kaiju No. 8 (054) (SR*)Alt-art parallel (★ / ★★)$27.00$23.19
Mina Ashiro (005) (SR*)Alt-art parallel (★ / ★★)$26.19$22.49
Kikoru Shinomiya (020) (SR*)Alt-art parallel (★ / ★★)$19.04$16.26
Kafka Hibino (063) (SR*)Alt-art parallel (★ / ★★)$18.60$15.88
Kikoru Shinomiya (019) (SR*)Alt-art parallel (★ / ★★)$15.92$13.55
Mina Ashiro (003) (R*)Alt-art parallel (★ / ★★)$11.04$9.30
Soshiro Hoshina (070) (SR*)Alt-art parallel (★ / ★★)$9.61$8.06
Kafka Hibino (062) (R*)Alt-art parallel (★ / ★★)$7.83$6.51
Reno Ichikawa (012)Super Rare$7.30$6.05
Soshiro Hoshina (031) (R*)Alt-art parallel (★ / ★★)$7.29$6.04
Kikoru Shinomiya (059) (R*)Alt-art parallel (★ / ★★)$5.68$4.64
Reno Ichikawa (050) (R*)Alt-art parallel (★ / ★★)$5.59$4.56
Iharu Furuhashi (028) (R*)Alt-art parallel (★ / ★★)$4.96$4.02
Kafka Hibino (063)Super Rare$3.61$2.84
Kaiju No. 8 (054)Super Rare$3.60$2.83
Kaiju No. 8 (055)Super Rare$3.10$2.40
Mina Ashiro (005)Super Rare$3.08$2.38
Haruichi Izumo (008) (U*)Alt-art parallel (★ / ★★)$1.82$1.28
Aoi Kaguragi (015) (U*)Alt-art parallel (★ / ★★)$1.55$1.05
Reno Ichikawa (009) (Box Topper Foil)Common / Uncommon$1.25$0.79
Mina Ashiro (004)Super Rare$1.08$0.64
Kikoru Shinomiya (019)Super Rare$0.99$0.01

How we work this out

We price every card at its TCGplayer market value, take off the selling costs above, and open 100,000 virtual boxes slot by slot using the pull rates in the table. The verdict compares the cards with the box price and checks how often a box loses money.

Read the full method