Crazypunkerguy

So I came across a 1876-79 rx4 wagon. I only got to see it from about 10 feet away from the back of a pickup. I didn't get to see the interior, if it was stick or auto or mileage. Supposedly it runs and drives but has been sitting for 7 or 8 years. What's it worth? Any spots to look for usual rust? It looked pretty complete from what I saw. It's 4 hours away but I am waiting to sell my current car before I go get a better look and offer cash for it! Any info would be helpful. Hopefully I will have a new mazda wagon soon (current is an 87 323 wagon).