Cuhulin,
Get back to us as to what kind of condition this van is in. Rust, body damage, high milage, etc. But I doubt it will be worth 1.5K. The evolution of the carb/emissions systems is this, 1st, there were carburetors, 2nd, there were carbs that talked to and got orders from the computer, then there were, 3rd, throttle body fuel injection and today, 4th, port fuel injection.
From a maintinece, reliability stand point, #1 and #3 are the best. Followed closlly by #4. So guess what the biggest nightmare of the lot is, #2, The infamous computer controlled feedback carburetor.
Either get something older or newer. BTW what part of the country are you in?
disston