Opinions and tips on selling on eBay...?

It's been my experience that, hour for hour, you're not going to be able to make a "living" wage selling hand-crafted products on eBay. Most people there are looking for bargains, and that's what you're up against. You would probably have better luck reselling supplies (i.e. fabrics, laces, etc.) to supplement (and draw traffic to) your doll dresses.