I spent nearly every weekend combing the local Half Price Books (we have 5 in the immediate area and several more within a couple hours).
At the Bethel Rd. location in Columbus I purchased a Near Mint shrinkwrapped Kara-Tur: The Eastern Realms for $27. I was very excited! I'm sorry to let the collectors here know that I de-shrinked and read it as soon as I got home!
There were piles and piles of shrinkwrapped
RPG box sets and board games from 1980s vintage. Since I only collect D&D, I was not interested, but this hoard is someone's wet dream. There were several shrinked
I.C.E. box sets, lots of shrinked City State of the Invincible Overlord boxes, a bunch of
MERP stuff, and several James Bond 007
RPG box sets from the early 80s. Lots of very rare-looking and old games there (all shrink wrapped). If anyone's even remotely in the area, it might be worth the drive to Columbus to check this stuff out.
At another location in Westerville, I got a very nice 1983 World of Greyhawk box with near-mint contents but a crushed box for only $13. Not as nice as the Kara-Tur, but I'm quite happy today with both!