How do you establish your market values? They seem to vary all over the place?

Condition condition condition. I suspect the algorithm values low mileage as well. I don't know car gurus' algorithm, but it's often an excellent start for negotiation with dealers and people who think their cars don't stink. Remember….it's just tin and there were thousands of the cars made… find another one if you don't like the price. The market is all-knowing, a dealer sells many cars and if he can't get his price he knows pretty much what the car will buy at auction…there are tons of cars that go to auction when a dealer won't sell or can't get his price because he went overboard on a good customer's trade-in to get a new car sale or keep a customer.

The cars options can also play a role in price as well as any carfax issues ie: accidents, ect and of coarse how many days its been sitting on the lot. There are tons of NC2 miata's for sale right now and are going to be more since the next gen miata aka ND will be out soon. Stop by miata.net for everthing miata its a great forum. good luck with your search.