Dear Mr Green Genes,
I shall ask a friend about the present market values of KN1400 and KN920. If he knows, you'll have an answer soon.
I hope that someone else in the Synthzone here will also be able to help you.
Your name is derivative of Frank Zappa's song "Son of Mr Green Genes". I wonder if there are any fans or devotees of his music and antics in the Synthzone. He was quite a stirrer by exposing just how stupid people can be, satiring their values and poking fun at their lives and follies.
He would have been a valuable (if not controversial) member in the Synthzone, would he not?