Is this a rare find since it's self-released?

Yes, as it was self-released by The Twin City Stompers in 2004, it holds a niche appeal for collectors of independent Jazz.

What format is this album in?

The album is available in the CDr format.

The Twin City Stompers self-released this album.

Name: The Twin City Stompers – Keep On Smiling (CDr, Album)
Brand: The Twin City Stompers

Jazz

What Keep On Smiling by The Twin City Stompers is worth on the used market.

Label · Not On Label (The Twin City Stompers Self-released)Format · CDr, AlbumGenre · Jazz

Used

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New / Sealed

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Price data verified against · 1

Keep On Smiling by The Twin City Stompers (2004) on CDr, Album. The Discogs marketplace floor is null with 0 copies currently for sale.

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

Is this a rare find since it's self-released?: Yes, as it was self-released by The Twin City Stompers in 2004, it holds a niche appeal for collectors of independent Jazz.
What format is this album in?: The album is available in the CDr format.
Who released this music?: The Twin City Stompers self-released this album.