craig's middlemen

The beauty of direct seller-to-buyer services, like the 'for sale' section on Craig’s List, is that they eliminate the middlemen, enabling sellers to get the entire cut. But they therefore require sellers to do all the work. And believe you me, it takes work to sell stuff on Craig's List: you gotta respond to a flood of emails/phone calls, be around when prospective buyers want to come by and check out the bike, re-post the ad every couple of days as it expires, etc. Economists tells us scarcity creates demand, and scarcity is a matter of context, so why not re-introduce the middlefolk in the context where they're lacking with a Craig’s List selling service? Pay a small fee, and they'll sell your stuff for you. Sounds like a ridiculous perversion of Craig's dream, but I bet there'd be a demand for it.