check AZ game and fish for laws......... AZ is pretty crappy when it comes to being able to own rare/cool fish........ hopefully its not the same for reptiles.
never seen a snapping turt or gator for sale in AZ so i'm guessing they are illegal to own
Pets Inc. in tempe has some South american Mata Mata turtles..... they get pretty big, and are $300 dollars each... they like warm tropical water, like tropical fish, but they look ugly to most people