Is Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack worth opening?

Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack: $4,299.41 of card set value vs a $7.80 price (551× value ratio). 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.

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Union Arena

Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack

Name: Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack
Brand: Union Arena
SKU: union-arena-ue05bt-demon-slayer-kimetsu-no-yaiba-demon-slayer-kimetsu-no-yaiba-box-promotion-pack
Price: 7.80 USD
Availability: InStock

Other

Current Price

$7.80

7D Change

30D Change

Last updated: Jun 22, 2026

Browse UE05BT: Demon Slayer: Kimetsu no Yaiba Cards →

Monthly Price History

Month	Avg	Low	High
Oct 2026	$7.80	$7.80	$7.80
Sep 2026	$7.80	$7.80	$7.80
Aug 2026	$7.80	$7.80	$7.80
Jul 2026	$7.80	$7.80	$7.80
Jun 2026	$8.73	$7.80	$9.47
May 2026	$8.53	$7.73	$9.47
Apr 2026	$7.66	$7.58	$7.73

Value Ratio

vs UE05BT: Demon Slayer: Kimetsu no Yaiba singles

Card set value

$4,299.41

Product price

$7.80

Value ratio

551×

vs 30d ago

≈ same

$4,299.41 of card set value vs $7.80 product price — about the same as 30 days ago. The set's 155 priced cards are worth 551× this product's price (was 548×).

Value ratio compares the card set value (the Inkwell Fair Value of the set's priced cards, sealed products excluded) to this product's price. Higher is better for buyers.

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Frequently Asked Questions

Is Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack worth opening?: Demon Slayer: Kimetsu no Yaiba - Box Promotion Pack: $4,299.41 of card set value vs a $7.80 price (551× value ratio). 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.