Must be a regional thing... I'm swimming in EPI and Genesis speakers, most from Craigslist, some from thrifts, one pair from eBay (price was good, but shipping was a killer - but seller was a short drive from work, so I picked them up.) Last time I saw some other valid vintage suggestions was much less recent... I actually had a pair of OLAs that I picked up at a Goodwill in 2006 or thereabouts, I don't think I've ever seen AR anything and eBay prices for ARs are crazy (maybe worth it, but still way out of budget.) Only KLHs I ever see are Twenty Threes which are a bit large for the OP I'm guessing.
Personally I really, really like good woodwork so I'd rather have my walnut 100s than anything with black vinyl faux woodgrain but if that is not a concern, I'll agree with the recommendation that the Elac Debut B6 seem to be very well regarded. I also have a pair of Energy Pro 3.5 in a spare bedroom and am pretty impressed with them. On my desk at work are some little Cantons, barely bigger than your typical HT satellites, and the sound out of those for the size is truly astonishing. So there's a couple brands to keep an eye out for in your Craigslist/BT trawls... Actually there have been a pair of Canton bookshelves with some cosmetic issues on DC craig's for a while, don't know if they are still there or not, only reason I don't jump on those is I have enough speakers I really don't need to be picking up any more.