I only knew about dumbo rats because a girl friend of mine buys her dumbo rat pets from a breeder (paying like $50.00 for two or something kinda high!). I thought they were the equivalent of a "designer" rat, until I saw them at two independently owned pet shops around me.

We ended up getting 3 pet rats to start a breeding colony, one of which is a female dumbo. She is definitely the friendliest of the bunch She "greets" us when we open the door to the bedroom. Kinda cute.