I imagine part of the issue selling it is the availability of these trucks out here, there's probably 10 squarebodies on Reno craigslist right now just from the last two weeks, ranging anywhere from beaters to Very well kept trucks like:
http://reno.craigslist.org/cto/4931701751.html
They are...
Why not put up a thread on a couple forums, like here and http://forum.73-87chevytrucks.com/smforum/index.php and see if there is someone in your area that wants a 4" lift who would trade you suspension. Their stock for your lifted, save you both money.