Loving that tail pattern! It's most likely just a normal BCI. I got my girl when she was around that size, from a local rescue. She's been just lovely (except when it comes to food), no snapping or anything. Let him settle in for a week while you pick out a name, and then just do quick handling sessions until you trust/understand his behavior type and patterns.
Congrats on your pickup!
Ps. it'd probably be a good idea to get him sexed properly, just so you know what to expect size-wise.![]()