Tuba - PT-6P

This is a B&S PT-6P that I bought 5 years ago while I was in college. 4 piston/1 rotor 5/4 CC, with excellent intonation (only have to pull the 4th valve out slightly below low F. Bought it from Custom Music for $10500, willing to sell for $8500obo/or trade. Now that I'm out of school, I don't need anything as big. I just need a smaller horn to play on.