I saw this bike at a vintage show last summer. I know the builder and have visited his shop. He is a helicopter mechanic in real life.
The bike is a great restoration. I saw only one flaw when I went over the bike. (It has a '77 tach.).
The price is $Cad, so in $US it's closer to about $11,000. Still lots of money but you won't find a better restoration anywhere.
classifieds.castanet.net/details/78_kz_1000/4845284/