Keep in mind, though, if you sell on eBay there's an eBay listing price, a percentage fee of the sale, then a percentage fee to Paypal. And that's not counting shipping charges if you don't pass those along to the auction winners (free shipping tends to garnish more attention). And then there's time invested in managing separate auctions.
Selling in bulk to Adorama starts to look like a good value when you consider all the details...