I'd also suggest " getting an eye" for what types sell and for what prices plus note which types / morphs HOLD their price year after year . For example here in the UK Royal morphs such as Albinos / Pieds - Piebalds / Bananas all seem to hold their prices fairly well .....
Apart from one adult Snow Boa all mine have been stunningly beautiful looking hatchlings usually bought a very good prices or traded with hatchings bought cheap and grown on ...