Welcome aboard! For what you intend the gun for and your price range, I'd suggest you try a modern hammergun. There are just to many in's and out's with a vintage hammergun for someone just starting out. A modern one will cost less in the way of ammo as you can shoot anything off the shelf. Also less worry about parts, bbls etc. Here's a few examples that might fit your needs:

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=385725714

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=386610524

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=386490932

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=385210927

Anyway, good luck!!! Remember half the fun is looking!

Best!

Greg

Gregory J. Westberg
MSG, USA
Ret