I went to look at home defense type shotguns locally and all I find is MB 500 and Rem 870 express. I know I don't need more, but I want the 500 M1 or the 870 police. Where can I find these? How much more $$? The 500 is $265.00. Thats the persuader 20" synthetic. The 870 is 18" for $365.00. Both...