Returns are a pain, yes. It'll be different for every vendor though, so you need to take it on a case-by-case basis. Honestly, my advice is to not worry about

Returns are a pain, yes. It'll be different for every vendor though, so you need to take it on a case-by-case basis. Honestly, my advice is to not worry about it up front, and dive in. You need to worry about making your first sale (which is seriously, very hard), long before you worry about returns. =) You'll figure out it when you need to.