This is a little complicated so please bear with me but I'd like some advice.

A friend of mine who runs a shop was able to get me a deal on a piebald ball python from a local breeder - because he bought so many snakes he was able to get the pied's price knocked down. Nothing that's unbelievable, but a good deal. He was going to keep the snake in the back of his shop in QT until I had paid it off.

So, I made the first payment, two weeks passed, everything is good. Then it was time for me to make the second payment last Friday. But the guy called me on... Tuesday I think and said there was a problem. The snake had a head wobble and it's tongue was lolling from it's mouth. He'd already rushed it to the vet and he said the vet said it was likely a bad/unusual reaction to permetherine in the QT tank, which was left over from a previous snake being in the enclosure and having it as a preventative treatment two months ago. Still with me? So the vet gave the snake some type of syrum to counteract the permetherine and it's apparently doing better, but hasn't 100% recovered when I last asked on Saturday.

I'm not making anymore payments on the snake for now because of this issue. My questions are these: Could those neuro problems be permanent? If they are, would you still buy the snake as a breeder or no? Do you think it may have other lasting issues from this incident? What would you do, if you were me, and this was your friend?