1991 LSC on craigslist - low miles - rust free - garage kept - has been for sale for a while, but the price has dropped. From the pic it looks like the suspension ( air bags ) aren't sagging. If the interior is decent ( probably is considering the low miles & garage-kept factor ) it seems like it would make a great DD.

http://pittsburgh.craigslist.org/cto/1967092004.html