A few months ago, a rash of Web 2.0 start-ups had put their projects (and assets) up for sale on eBay (EBAY). Some of them actually sold – like Kiko (for $258,100). Now it is the turn of Facebook App developers to put their wares under the hammer. Michael Zhang is selling his Logbook Facebook App. So far he has 21 bids and the top bid being $172. Why do I get a feeling that this isn’t the last Facebook app to list on eBay. Is this a sign of a coming top in the Facebook market?