Consider this another data point, for whatever it's worth: I just took the sort of plunge JonnyBoy mentions above and bought a K120 on ebay for $200 (plus $25 shipping). I think the listing was less than 30 minutes old. I was searching on a whim, saw it in the results alongside the usual recone kits and more expensive European K120's that seem to be eternally listed, and decided I'd roll the dice with the speaker. The seller has a less-than-100% rep., which makes me nervous, but hopefully I'll get lucky
By the way, I saw this as well, potentially a pair of K120's for $350/BIN (+$65/shipping) in "square dance caller" enclosures:http://www.ebay.com/itm/VINTAGE-HILTON- ... 913wt_1165
The seller is a bit coy in the description about whether these are really JBL K120's, but if I needed a pair instead of the single I bought I'd probably write him and ask him to confirm that they were actually JBL K120s. That would be a decent deal if they were, in fact, K120's in those enclosures, as one could resell the bare enclosures after purchase for a bit of a rebate.