I don't think you could go wrong with a used TC .50 caliber Hawken that is in good condition. To repeat what has been said above -- check the bore very carefully. Also, make sure the nipple can be easily removed. Maxi-balls always shot well from my Hawken and were more user friendly than patched round balls. The rifle and all accessories should be way less than your upper budget limit and probably much closer to $500.
