My two best JBL finds:
Circa 1988, I bought a demo pair of L60t at the going out of business sale for a electronics retailer in the Hartford, CT area. Don't remember the exact $$$ but I do clearly remember that it was 1/3 of their usual price. Although there was a negative -- one of the tweeters turned out to be intermittent. Got a replacement from JBL quickly. Only problem is, the speakers were too bright for my liking once both titanium domes were working. So I sold them.
My most recent find: A mint pair of S38 II in black _with_ stands for $100.