what makes you the expert
Really great question. I have been wondering myself how car gurus comes up with the deal ratings since they are somewhat Radom and often bogus. I have built my own computer models for finding good deals for each vehicle I am interested in by getting prices off autotrader, eBay but it now's, etc. then use year, mileage, major accessories, and do the stats (multiple regression). My models are better and rarely match car gurus........I could help them!, but you can do it yourself too, especially if it is just one car model of interest.