Is this cassette truly rare?

Yes, it is a Limited Edition release from 2004, and only one copy is currently listed for sale.

What is the format and label?

It is a Cassette format, self-released by Mirthless under the "Not On Label" designation.

This specific release, Rehearsal I, is categorized under the Rock genre.

Name: Mirthless – Rehearsal I (Cassette, Limited Edition)
Brand: Mirthless

Rock

What Rehearsal I by Mirthless is worth on the used market.

Mirthless value — Discogs floor ￥996 · $6.36. Prices updated 2026年6月.

Label · Not On Label (Mirthless Self-released)Format · Cassette, Limited EditionGenre · Rock

Live on eBay now

Converted from USD at the ECB reference rate — sold comps are US-market sales.

JunkPal AI· resale insightanalyzing sold comps…

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価格データの検証元 · 1

Rehearsal I by Mirthless (2004) on Cassette, Limited Edition. The Discogs marketplace floor is $6.36 with 1 copies currently for sale.

Pressing, country, and condition (media + sleeve) move vinyl/CD values the most — first pressings and clean copies command a premium.

What this actually trades for — sold values by condition vs. what sellers are asking today

Condition	Value	Based on
Discogs floor	￥996 · $6.36	eBay sold comps

Is this cassette truly rare?: Yes, it is a Limited Edition release from 2004, and only one copy is currently listed for sale.
What is the format and label?: It is a Cassette format, self-released by Mirthless under the "Not On Label" designation.
What genre does this Mirthless release fall under?: This specific release, Rehearsal I, is categorized under the Rock genre.