i know here in canada they range from 800-1200 for albinos so thats half price of what we would pay here, i would be a little concered of the ball pythons health if he is selling it for that low, but maybe he just really needs the space or is moving or something, id ask a few questions as to how the snake was kept and what not . . i noticed there was some poop/pee/urates in the top right of the picture but it could be fresh, when picking it up if you do look for retainin shed, scale rot, check the mouth out make sure everything looks normal, the snake does look a little weird in the pic could be dehydrated and that kinda does look like a kink in its back but its a small pic and i cant really see . . . i noticed you currently own ball pythons so you should know what they need to look like to be healthy, hope this helps and good luck!!