We buy brass instruments from local pawn shops (after the kids determine they want to continue past the first year), then pay to have them fixed up/repaired/cleaned at a local music store. I have bought several instruments this way and never paid more than about $200 total for instrument and case, then whatever the cost to rehab it is. Many people sell old instruments to pawn shops, and honestly, we use our own mouthpieces and once they are rehabbed/cleaned they are good to go.