That's a heck of a price for a pair of good working KLH9s! I'd have them myself if they were anywhere near me - it would save me a bunch of work.
I have doubled 9s, but one of the crossovers has been acting up and it's a PITA to melt out all the potting wax to service them, so they've been cast off to the workshop until further notice.
BTW, if someone here is interested, they should know that although the tweeters are standard JansZen squares (available quite readily, and RtRs will work in a pinch), the bass panels were proprietary. They are pretty robust, but figured it's worth mention that in case one should fail, cannibalizing another KLH9 is the only source for spares. I've never needed one, but have collected half dozed over the years, just in case!