Hi guys,

does anyone know of a website that shows the average price of a car over time. All I can find are general or my a single make, not models.

Basically I'm looking at selling my B6 S4 now, saving up and getting a C7 RS6 avant in 18-24 months time, and just wondering how much they might cost me in the future. They're around the £30k mark at the min, hoping the prices will drop a bit over the next couple of years! lol