I guess my question is...why shouldn't you be able to sell rats off as pets? I do occasionally although I don't really try to, but if someone is looking for a pet I can usually find one they like. I don't worry about how socialized they have been because rats are very social by nature anyways. I can go into any cage and do anything I want with the rats or their babies and not be concerned about being bitten, if I do on rare occasion have an agressive rat, it usually gets put down right away...usually this is a new mom on babies and she may or may not get to raise the litter. If she really being highly agressive (charging across the cage in attack mode) she's going down right away and the litter gets scattered through other cages to be raised. This is very rare for me though and out of about 30-40 colonies at any given time, I probably run across a rat like this only once every 2-3 years at most.

All my rats get treated the same and it doesn't matter if it's a standard brown or hooded, or a pew dumbo rex, a blue berkshire dumbo rex, or a hairless dumbo, etc... they all get the same food and live in the same cages and I don't doubt that any of them could make a great pet if someone wanted it just as well as the others next to it.