For a broader view of the online market for used cars, why not spend some time searching on Google, Yahoo or Bing? By typing in the model and 'for sale' you may stumble across some listings that you never otherwise would have found. A google search will show listings on ebay, private sites and many other outlets. This is well worth a try if you can't find what you are looking for in any of the major places, and especially if you are looking for something specialised such as a classic car.