How about a way to put a limit order into ebay?... ie, instead of searching for a Sony Vio PCG-R505TSK and searching the list entries... assume there is one description and multiple sellers... and then build an exchange where you match buyers and sellers... like a stock exchange. Like everything else there is probably 1000 items that make up half of ebays volume, why not make a std description of those items and match buyers and sellers
Kjotis@Swbell. Net: do you blog?

not sure if that is poss - seems like someone will always have something a bit different - different color, size, age etc need to account for condition of the item unlike a stock which are all the same.

Net: ... but lots of ebay is new... what i find is everyonce and a while there is a deal ... like something closes in the middle of the night... so this 'service' could arbitrage that anomily
Good points!