I hate to do this, but I have posted my treasured 1981 VW Rabbit Diesel on the Phoenix, AZ Craigslist:
1981 VW Rabbit Diesel
It is really pretty darn easy to get ~50 mpg in town, and over 60 on a trip with this car. The modifications are pretty minor but they add up to a car that gets better than EPA, and is much faster than stock. The exhaust system cleaned up the emissions so much, you could crank up the max fuel flow stop, and make it much faster, and still pass emissions.
Based on e-Bay sold prices, the car is priced to sell. Hopefully, someone mechanically inclined, and familiar with the VW 1.6 NA IDI engine will buy it.
I had a number of things planned for it I never got around to. I am pretty sure with some more work, it could be a 75 MPG car.