See this thread. ( There just isn't a market for common older stuff. Think about the 20's - 30's grand classics that, in the 40's were sold to farmers who cut the back off to make a pickup truck , repair garages that turned them into a tow truck. Now they are the subject of Pebble Beach. )

http://www.peachparts.com/shopforum/diesel-discussion/387892-such-difficult-time-part-sell-used-cars.html