I don't know were you are located but i was in the car business for a long time and the best place to get a buy on one is a auto auction like Adesa or a manheim bank repo's or someone wanting to out from under a payment a lot of people will take the pay off right now there are a few in this area like that .
But for what you are looking for is going to be a older one the diesel's still bring pretty good money i was at adesa last week with a friend of mine that just bought one .
Now you need to have your paper work in order from your bank or cash or approved funds and these are sold as is there is no warranty with these at auto auctions so you need to get there in time to go out and look around and check them out.
They will sell them under a light system Red light means they are one hundred percent as is.
Yellow light means they are going to make a announcement about the vehicle and green light is auction guarantee witch means that it runs and drives the trans is OK and there is no major problem with the engine witch is only good for a day so not much a warranty.
And if you can take some one with you that has knowledge of them. .
Kind of long but just a thought and there are some real good buys if you are close to a auto action that is.