I like it. It's a stock exchange except the stock is all physical goods. Of course as you mentioned there would be clustering of items for this to work, but th

I like it. It's a stock exchange except the stock is all physical goods. Of course as you mentioned there would be clustering of items for this to work, but the principle of the system is that all items in a category are 100% interchangeable. In the stock market one share in X corp. is no different than another share in the same corp. For 2G iPod Nanos there are very specific differences (color, usage, markings, etc.) that will deviate unlimitedly. I guess the way this would work is buyers would know what they want (2G iPod Nano), see what the going rate is (ask), if interested, make an offer (bid), and then when the buyer is matched to a few potential sellers, they would have a chance to look at the individual products to either confirm or deny a final sale. A nice benefit of this is that you can see what sort of 2G iPod Nano $90 will get you (say if you're on a budget), simply by "bidding" $90 on the product and seeing your matches. If they're aren't any matches, you need to bid higher. If you have a few matches, you'll probably be seeing some beaten up iPods, but that's fine - you only wanted to spend $90. With eBay, if you look for $90 iPods, you'll only see current auctions, and the final price will most likely be bid up before the close.