Thanks for your suggestions. I've looked at many of those things, because I'm using those sellers as my "mentors" and have styled my auctions and policies in a similar manner. My feedback is 100% positive, but a low number. So I don't really have a customer base. I've e-mailed some of the more successful sellers of products like mine, and they do mention their base of repeat customers, so I guess that's a big factor.
Thanks for your good suggestions.