I have seen these KN6000 actually Sold on Ebay
for around $600-$650......
I even remember paying so much more $2700-$4000 when they came out in the mid 80's for one many year's ago.
http://www.ebay.com/sch/i.html?_from=R40...ete=1&rt=ncWhat arranger Kb is next for you?
Good Luck