I've been playing the euphonium with the same beaten up, non-compensating three valve yamaha euph since I started in 6th grade. As I plan to play in college next year, I'd like to get rid of my current horn and purchase a compensating four valve (probably used and 3+1). Does anyone have any advice as to what I should buy and how I should sell my current euph?

Some notes: I'm not a hardcore player, I won't be majoring in a music field, and as a future college student I probably don't have the money for the absolute best. I just need something decent. My current horn is also at school right now, so I can find out the exact model later if that seems relevant.

Thanks for any potential help!