What are the average prices for partial pinstripe and flame crested geckos?

This can vary widely depending on gender, base body color, and any other markings or patternings, but generally speaking, partial pinstripes go for around $100+ and flames go for anywhere from $20 and up. Flame is definitely the most common morph in the trade, so there's a lot out cheap ones out there if you aren't too picky. The higher end ones will be in the hundreds though.