TubaForum.net

Brand: Vincent Bach Stradivarius brasses
Style: Classic Tuba Sousaphone
Material: Brass
Location: Austin, Tx
Price: $80 plus shipping
phone to text 512-709-7253 to start conversation

Bought for 6th grade band student and she did not like band and dropped out after one semester. Barely used and wanted to check to see if any needed one at a discount considering we see priced on internet from $95 to $155. We paid $120. We can text photos.
Thanks for considering it for a deal for both of us.
Laura

There should be a model number, like 18 or 24, on the side of the mouthpiece, that will be useful information to a buyer.

Or maybe it just says "Classic Tuba Sousaphone", and I don't know what I'm talking about.

What jtm said. There will be a number on the side of the mouthpiece. Most likely, for a 6th grader, it will be one of the following: 18, 22, 24AW, or 25. I would be surprised if the mouthpiece has any other number, although there are other numbered mouthpieces in this series. Each number represents a model with a slightly different size.