Auctions of handmade items are notorious for underselling. I won't even do charity auctions anymore, as my jewelry never fetched anything near what it was worth, and then, worst of all, people thought that that was what I sold my items for. The horror!
Don't sweat it. You're not the only one. Perhaps doing more in-person craft fairs would do better.
Your work is BEAUTIFUL. I'm sure you'll sell lots when you find the right marketing/promotion/selling venues. We're also in a down economy, so ppl are pinching pennies. Don't worry, your shop will do better and better :)