TromboneChat

I have a couple of older Bach mouthpieces that I'm thinking of parting with, but am not sure what their value is.

An extremely nice looking VINCENT BACH CORP MT VERNON NY 12c

A very nice looking VINCENT BACH CORP 15CW

Any idea?

Really nice MV 12Cs could probably go for $80-$100 on ebay. I'd ask like $120 and go down from there, but who knows, you might get more.