If you are on a tight budget for a little over $100.00 you can buy a single shot Stoeger Hunter or a NE Firearms Pardner (I have this one) in a full choke that handles a 3" shell and kill turkeys quite successfully.

I have done this for a number of years even though I own Brownings, a Beretta, a Benelli, and a number of other manufacturer's shotguns. You don't have to worry about these guns getting down and dirty or scratched and turkey hunting is a one and done type of thing anway.