check out buds gun shop, sportsman's warehouse, or muzzle-loaders.com, cabelas has some good sales sometimes. Shop around for a couple of weeks on those web sites and get the best deal you can find.
I bought a used CVA Wolf off of bud's gunshop for 50 dollars. It shoots great. Killed a deer at 75 yards with open sites and 125 with open sites. I shoot 100grains of bh209 with 250gr powerbelts.