Hairless Rats...question before buying?

Ok so I was at petsmart like not that long ago, and they still had this female hairless rat, and she's so adorable. It is something that I have wanted for a while, but before all I could find were males, and I would prefer a female. I have never had a rat or mouse before, but I have had hamsters. I know that the cuteness factor, and the uniqueness is probably making me want to rush into and buy he