If I ever get to a point where I feel my quilts are 'sale worthy,' I don't expect that I'll ask much for them, simply because (one, I never give myself enough credit), but mostly because I just want to continue the hobby. My "free time" is just that; I spend it doing things I like to do, and am not expecting to be paid for things I do on my own time. Having said that, I would hope to get maybe $20-30 more than I spent on materials for what I might put up for sale.
Of course, if I were doing it for a business and grocery money, that would be a different story.
Right now, though, I haven't learned enough to put out what I consider a 'quality' product (at least not from a 'finishing' standpoint of what my binding and SITD looks like- UGH!), so for now my 'practice' quilts are giveaways.