To my way of thinking a possible het is obtained by breeding a normal to a het, thereby producing poss hets. If the father is not a het for the particular morph then it is NOT possible to be het. ( just restating that which I realise you know anyway ) The only way that I would be happy to buy a possible het in these multi-male circumstances would be if the baby snake were priced as a normal and the circumstances were explained.

If two of the males fertilised some of the eggs, and someone bought a baby as a poss het without understanding the background, then they could waste several years breeding their poss het for no purpose. At least if it were from a het father they would truly have a chance of it being het.