I've seen people drop $250 easily for the perfect pastel female. But those are for the best examples of the morph.
Anyway, are you 100% sure she is female and healthy? Because if it is a female, $50 is a great deal! I would go for it.
However, if it is a male, its not that much of a discount.
I personally haven't seen any good deals in petstores or reptile specialty stores. But I understand that their high prices are to support their business as well.