Hi John, KN7000s appear quite regularly on UK eBay and currently sell for between £500 - £850 (US$ 630 - US$ 1073)https://www.ebay.co.uk/itm/332967176223?ul_noapp=true
Unfortunately I doubt if any one would be willing to ship to USA
Wonder if you've checked eBay USA ?? I've just looked and found one here :
It's in Phoenix Arizona.......