Natchez has a sale on Nikon 4x40mm Buckmaster Scopes with the Nikoplex lens for $99.95 I have thought of them. They are a good scope and with 4x on center fires we used to shoot some real long distance with no problem.

If you really want to go cheap, Simmons Pro Diamond 4x32mm for Shotgun and Muzzleloaders. They are $39.95 but are really a good tuff scope. I have two of them and have not shaken them apart yet.