This is a lovely 20-button Anglo-model concertina.  It has been lightly used (mostly sat on a shelf after my initial enthusiasm at learning to play waned), but still plays as well as the day I got it.  It has a 2-1/2 octave range, reinforced bellows, and red pearloid endplates.  No brand name, but it was purchased at Guitar Center for $149.  It's a really fun instrument to play around with, and a good starter for someone interested in the concertina - prices get astronomically high with these instruments, so better to start here before breaking the bank.

Happy bidding!