Below is my opinion, so it's up to you to take it or not.

The cons of doing this : You import ball pythons that should have live in the wild, thus making the wild population smaller.

second : You have less chance of getting anything genetics from there. It did happen and might happen again. But think about it, in the farm, someone have already pass to look at them and see if there was anything interresting in it, if any there were removed. The person who imported them here, also looked at them and probably collected the interresting one. Then there can be some other person in between, and then you pass.

So what's the probability ?
Not none, but still low IMO.