So, wait a minute. I thought Paypal was blocking Bitcoin purchases? It looks like there are Linden Dollars regularly for sale on E-Bay as well. Why aren't more people selling Bitcoins on E-Bay?
Well, when you make an ebay auction, you are feeding the paypal/ebay monster. It's not very seller friendly. The buyer probably won't pay more than the current exchange rate, and you will receive much less than the current exchange rate because of paypal/ebay fees. I suppose it's marginally useful if you know how to protect yourself as a seller on ebay, but if you can do that, you are better off selling elsewhere.
The auctions are great for the buyer though, you can bid as much as you want, the seller eats the fees, and you get ebay bucks for your next purchase.