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 :

https://www.ebay.com/itm/Technics-sx-KN7000-Keyboard-Synthesizer/254031214453?epid=217345936&hash=item3b2570b775:g:gtwAAOSwckVcGVnE:rk:3:pf:0

It's in Phoenix Arizona.......