kavvz: hey Golftown I've got these cheap crappy balls here that I haven't used...how's about I give you those, and you give me some new Pro V's?
Maybe he meant something more along the lines of where you receive a gift or a promotion for a ball, you don't use, and would like to substitute it for a ball you would use.
Take the L75 Bridgestone that was offered in one of the promotions, its valued at 925 credits. Yes, you can use it on rounds you don't care about, but it feels like a waste if you don't have notes or have it mapped to play the ball competitively.
So you have to waste hits on a ball to get some general notes on it, or you just use it for clashes or hack rounds, where you don't care what you score. It feels like a waste of a good ball.
Why not allow players to exchange it for a ball of equal or less value for a ball they would feel better about actually using.