Is SAKAMOTO DAYS - Booster Box worth opening?

SAKAMOTO DAYS - Booster Box is currently not worth opening on expected value: $9.67 of expected singles per box vs a $90.51 price (0.11×). It is worse to open than 30 days ago. Expected value is a model estimate from set-wide Inkwell Fair Values and typical pull rates — individual boxes vary.

How is the sealed product price tracked?

We track sealed product prices daily and blend them into an Inkwell Fair Value. The chart shows historical price movement over time.

What does the value ratio mean?

The value ratio compares what you can expect to pull from the product (or, for products without a pack model, the total value of the set's singles) to the product's price. Above 1.0× means the expected singles are worth more than the price.

How often are sealed prices updated?

Sealed product prices and the value ratio update daily as part of our automated price pipeline.

📦

Union Arena

SAKAMOTO DAYS - Booster Box

Name: SAKAMOTO DAYS - Booster Box
Brand: Union Arena
SKU: union-arena-ue19bt-sakamoto-days-sakamoto-days-booster-box
Price: 90.51 USD
Availability: InStock

Booster Box

Current Price

$90.51

7D Change

30D Change

Last updated: Oct 8, 2026

Browse UE19BT: SAKAMOTO DAYS Cards →

Monthly Price History

Month	Avg	Low	High
Oct 2026	$89.97	$87.51	$90.51
Sep 2026	$83.49	$80.69	$87.51
Aug 2026	$83.34	$78.73	$89.17
Jul 2026	$89.17	$89.17	$89.17
Jun 2026	$92.56	$89.17	$97.04
May 2026	$104.51	$96.04	$118.42
Apr 2026	$96.28	$96.04	$96.52

Worth Opening?

vs UE19BT: SAKAMOTO DAYS singles

Expected singles / box

$9.67

Box price

$90.51

Value ratio

0.11×

vs 30d ago

▼ worse

$9.67 of expected singles value vs $90.51 box price — worse to open than 30 days ago. Expected pulls cover 11% of the box price on average (was 12%).

Expected singles value is a model estimate from set-wide Inkwell Fair Values and typical pull rates — actual boxes vary. Not a guarantee.

More from this Set

SAKAMOTO DAYS - Booster Box Case

$1,629.47

Top Cards from this Set

Taro Sakamoto (026) (SR***)

SR***

$783.33

Taro Sakamoto (026) (SR**)

Taro Sakamoto (025) (R**)

R**

$280.39

Heisuke Mashimo (008) (SR**)

SR**

$275.51

Shishiba (055) (SR**)

SR**

$257.25

View all UE19BT: SAKAMOTO DAYS cards →

More Union Arena Sealed Products

Demon Slayer: Kimetsu no Yaiba - Booster Box Case

$3,500.00

SOLO LEVELING - Booster Box Case (First Edition)

$3,099.32

CHAINSAW MAN - Booster Box Case

$2,792.85

SOLO LEVELING - Booster Box Case

$2,759.47

Inuyasha - Booster Box Case

$2,328.42

Demon Slayer: Kimetsu no Yaiba Vol.2 - Booster Box Case

$2,223.71

Browse all Union Arena sealed products →

Frequently Asked Questions

Is SAKAMOTO DAYS - Booster Box worth opening?: SAKAMOTO DAYS - Booster Box is currently not worth opening on expected value: $9.67 of expected singles per box vs a $90.51 price (0.11×). It is worse to open than 30 days ago. Expected value is a model estimate from set-wide Inkwell Fair Values and typical pull rates — individual boxes vary.
How is the sealed product price tracked?: We track sealed product prices daily and blend them into an Inkwell Fair Value. The chart shows historical price movement over time.
What does the value ratio mean?: The value ratio compares what you can expect to pull from the product (or, for products without a pack model, the total value of the set's singles) to the product's price. Above 1.0× means the expected singles are worth more than the price.
How often are sealed prices updated?: Sealed product prices and the value ratio update daily as part of our automated price pipeline.