As a pet owner (any pet) you don't give them up because you like another one better. I don't get that at all. They become a family member. I love my boople and I wouldn't give her up for anything. Yep there are prettier snakes out there, so what. I can admire them but I won't sell boople because I'm suddenly not happy with how she looks as opposed to a different one.
I can see why breeders do it. That I feel is different.