Eh, you never know, these days. Het males are often so low-priced that a lot of breeders just sell them as normals. There's little point in trying to sell poss het albinos, poss het ghosts, or poss het pied males as anything other than normal, either. As a result, they wind up being sold as pets.

A normal male could really carry any recessive gene. You're unlikely to ever find out about it, because who would breed a single gene poss het male to a known het female or visual female? 100% het males are so low-cost, it wouldn't make sense to breed a poss het male.