Nifty idea. I'm just north of NYC, and I'd like to try an Adams E3 someday. The horns I have in return are nothing special - a Mack Brass euphonium and a Bach 36B - but I do have a gem of Steinway A. If none of those are appealing to try, Delilah and Jazz (the pups) are also fun to play with.
Dean L. Surkin
Mack Brass MACK-EU1150S, BB1 mouthpiece
Bach 36B trombone; Bach 6.5AL and Faxx 7C mouthpieces (pBone on loan to granddaughter)
Steinway 1902 Model A, restored by AC Pianocraft in 1988; Kawai MP8, Yamaha KX-76
See my avatar: Jazz (the black cockapoo; RIP) and Delilah (the cavapoo) keep me company while practicing