I think people are missing a key point when comparing this to real world economics. There is only one place to go to buy/sell. Using this real world example that applies to me currently, if Walmart sells X for .99, but Target sells it for .98, I'll still go to Walmart because it's closer. But if I only had to go to one neutral spot, then pick a store out a listing, then of course I'd by from Target. That just throws things for a loop a bit and makes it harder to compare to real world economics. Granted you can kinda do this with the internet, but you still have to go to each website, and special offers and shipping and crap like that. There is no just listing of get X for Y kinda deal.