trumpet blower88

Hi everyone. So was walking around an antique store with my Great Aunt the other day and I noticed this old, beat up York trumpet, the girl working there agreed to $15 for it so I got it, whats the worst that can happen, I'm out 15 bucks. Anyways, it's in pretty bad shape, it looks like it's been droped out of a truck and then backed over or something. It's got a really old mouthpiece that is stuck in it, really stuck, like never comming out stuck, and the mouthpice receiver actualy came apart off of the lead pipe, the only thing holding it on is the brace comming off of the bell. The third valve slide is stuck and the main curve on the bell (the part that would be closest to your face while playing) is compleatly bent and smashed up. Even with all of this it is still playable, sucky, but playable. And amazeingly the valveds and valve caseings are in perfect condition and actualy work better than the valves on my marching horn. Do you guys think it would be worth it to fix it up? Its hard to tell if it was ever a good horn before, the serial number and whatnot is all warn off, the only thing i can see is an "8", I'm not even sure how old it is, I'm just guessing the '70's. So how much do you think it would cost to get it fixed up? And is it worth it? I probably wouldn't play it much except maybe in our litle garage band...

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-David Jacques