Yea.. i don't know what trucks sell for in your part of the country, but something like that with a title would sell for more than 300 to 500 bucks on eBay without a problem.
But on the same token, it sounds like the guy has been good to you in the past.. but that truck has sentimental value, and thats hard to put a number on.. if at all.
I'm not generally a fan of the AD style trucks, but that one sure is purdy.. maybe i'm just a sucker for old iron in need of some TLC.