Keeping a historical trove of prices would also be really neat-- then you could see what to expect. It's cool, I would use it. I'd love to be able to set a ra

Keeping a historical trove of prices would also be really neat-- then you could see what to expect. It's cool, I would use it. I'd love to be able to set a range of mileage and price, filter by model names, location, etc. etc.