Some people do this however there are concerns with moving snakes between collections. Illnesses and mites are the main concern, plus the added stress of moving the animal between locations could cause the male to under perform.
You also have to watch out for scammers and other dishonest people. Even with a solid contract, people have been screwed over. Usually the other party keeps the snake, says it's dead or sick or says the female never laid eggs or the eggs went bad or some other excuse.
For all the good it would seem to be to stud out a male, in the snake world it's more of a hassle than it's worth. Unless you find someone you trust 150% I wouldn't mess with it.