"Why should I spend the extra money getting a fixed male ferret?"
Unfixed ferrets are almost always cheaper. But even though fixing at 5 weeks (the standard petstore age for fixing) can be detremental to a ferret's long term health, it's better than not fixing your male ferret at all. He will be happier being able to be around other ferrets, and you won't have to worry about agressive ruts and smelly teritorial marking. He'll also have a better scent by far. If you can't afford the price of a fixed ferret, you probably can't afford a ferret at all.
"If it doesn't change his health, why bother neutering?"
"I don't care if I have to keep him by himself"
"I want to use my male to stud, so I won't have him neutered."