I think you also have to think that as a breeder, the value of the animal is not the price paid, or the price you could get if you sold him then, but also his/her potential value as a breeder. A pastel female pet isn't worth as much $$ as a 3 year old adult pastel breeder female ready to be bred and produce.
A het pied male hatchling? $50. A adult het pied male, ready to breed that throws good pieds from your het pied females? Much more valuable.
This is all considering DOLLAR VALUE. This is beyond the value as a companion, or the 'sentimental' value of an animal that you've had in your collection for a while, or if it might be an exceptionally brilliant individual.