The best places to check out are Craigslist, Ebay, maybe half.com, might even look on cheapassgamer.com. Every once in awhile someone is selling games there. Even maybe the local facebook garage sale sites sometimes sell game lots. Of course, I'm going from experience living in NE Texas.
Might even check out goodwill and bonanza.com
Not many people on this site willing to sell much of their stock unless they own duplicates and even then, its trades.