Here's a nice one. http://detroit.craigslist.org/mcb/ctd/5771689130.html It's at a dealership. They claim 36,280 miles and want $17,995.
According to the "Standard Catalog of Ford" (4th Edition) the MSRP of a Country Squire in 1978 dollars was $6,207 (NADA Guides says $6,018 for a car with a 351 and A/C). In 2016 dollars that is $22,909 according to this inflation calculator. So maybe $17,994 isn't too far off if it really is only 36k miles. Nice car.