Ineteresting, Something to keep an eye on.

It gives the allure of making a buyers market
eg:'I'm in Denver; I want a four-wheel-drive; I'll buy my own gas; I'll decline the (insurance); I want it on these days; and I'm willing to pay such-and-such,' and then see what happens.'

...but in this capitalist society, how many people are going to bung up the sytem with unrealistic expectations.

It also looks like a great way to invite spam.