If the breeder was trying to cheat someone I can think of a lot of other Hets they would lay claim to before ghost considering het male ghost might get just barely more than a normal male. (Unless it is a proven breeder, then it might go for double the price of a baby het ghost male according to my research of the market.)

Your big problem is the long road ahead of you if you plan on actually making ghosts using him. If you are lucky you may have a ghost in a couple of "years". If the het route is the way you are going then all I have to say is relax and enjoy. Single gene male het recessives tend to be cheap, but that is due to the fact that without a het female it will take you a minimum of 4years to prove it out and that is if the odds are in your favor and you have a normal female that is ready to breed.