Nice, clean layout. I kinda wish there was more depth and dimension to the search component to draw more attention to it.
Hi, cool website, I like it. The fact it gives other results depending on the changing of the price ranging and without reloading is just... impressive and awesome! Instead of writing of displaying all the models you can browse which uses a lot of space, why not use the same kind of menu you are using for make and model? You have a lot more place for something else (even a big logo or a cool custom drawing or something) I would make you header a little bigger as well. Last thing : I think you should work on your ad integration. Overall your site is very good IMO.