The amount of misinformation in this thread is horrible.
A - They smell because they have musk glands through out their bodies. NOT because they "Piss on themselves"
Yes, they can be nippy if not handled regularly and are very mischievous animals. They are part of the weasel family. It's just how they are. I've own a few personally and they each have their own personalities. Some are super fun, love to play; while others don't want to be bothered. Also Females can die if they go into heat and aren't bread.
B - Do some reading about them on the INTERNET or an owners group etc. They are illegal in some states.
C - Finally please don't buy an animal you have no intent on learning everything about, or taking care of or treating if it becomes ill or needs medical attention. It's not fair to the animal...