I would never buy a new one because there is nothing to a banshee so little can go wrong. If you buy a new one I sure that it would be around the 5500 price range, then you have to buy exhust average 500 bucks then jet kit another 50 bucks or so. Now you are over 6000 bucks, you can buy a very nice banshee with alot of extras for less than 6000. Buying used is the only way to go I think, even if you have to rebuild the top end you will still be saving money.
Just my 1 cents