If he bites again, he's probably still hungry. Not eating for a month will do that. If you can, try to find out how often and number of prey items the previous owner was offering. Your guy may take more for a couple feedings then taper off.

Example: When I bring a new snake home, the first 2-3 feedings are to test how much it wants to eat. So the first feeding I'll offer 1 prey item appropriately sized. Second feeding I'll offer 2 items of the same size. Third feeding I'll offer 2 again. If the snake takes one and leaves the 2nd I know it'll be a 1 prey item snake for the time being and occasionally offer a 2nd when it starts getting bigger. If it takes 2, then on the 4th feeding I offer a 3rd prey item assuming it'll leave the 3rd one alone. The third or fourth feeding is when I really find out what the snake is going to eat on a weekly/bi-weekly basis.