I agree about asking him- I would start by saying taht the quilts generally for for about $500 and let him tell you what he was thinking- he might be thrilled for you to do it at $500, but he might be crushed and respond 'gee, I was thinking more like $50' It would at least give you some starting point and a way to negotiate a price that both of you feel is fair. I would ask, though, that he not disclose how much he paid for the quilt if somebody asks, and if he asks why just tell him that you're trying to start your business and grow it and cannot do a lot of special projects right now. :-)