Well was looking on ebay the otherday and came across a PSR-6700 (circa 1991).
It had a few watchers, but as listed for spares or repair it was stuck at 99p 30 minutes before it sold, so me being me (like old boards to tinker with), put a bit of £23 on it, low and behold I won it, for £3.20!!
I thought the seller wouldn't sell at that price, but low and behold he did. So picked it up yesterday as only 30 minutes drive from mine, well when I say picked, more like put my back out, good god is it heavy, I thought my old 9000 was a brick!!
Anyways got it home, and yes it does need a repair, at some point someone dropped a drink on the keys and it ate 2 diodes under the keys, but that's it. So its going to cost me £3.99 for 50 switching diodes (keep some spare for my other boards) and it will be up and running, as using my controller keyboard it works perfect.
One interesting feature I wish they'd put an option of on my s900 is a function called interactive accompaniment.
This feature is great if your playing and for some reason have to leave the keyboard, or your wanting a couple of slurps of your beer, it will start playing itself, not just backing, but adlibbing in the key your playing.
But unfortunately, the board won't be staying as when it's all fixed up, its being donated to a local church that has a keyboard group.