The price looks a little high and the end case looks to wrong.
There was a QL with a Schon keyboard on Ebay recently that went for 104 pounds, which I bid a maximum of 70 pounds. All too expensive.
My idea was to try and copy the Schon keyboard with a view to making more. But looks like this is not going to happen now.
Derek, I have somewhere in my QL collection a Schon keyboard, when I eventually get all the boxes sorted out, an extension built and a bit of space we can go through this at some length.