You can also try www.sospubs.co.uk (Sound on Sound website) look under the READERS ADS. I have bought and sold loads of kit from there before. If your gonna use "these" vintage keyboards make sure you know a little bit about them before you go and see them. Old keyboards would probably of taken some beating in it's time so make sure all the keys work and hold a note to see if it goes out of tune (loads do). Personally I would'nt bother too much about getting a old synth as you never get a good spec compared to todays synths and programming the old ones are a nightmare so unless your well up for going OLD SCHOOL I would pay the same money and get something newer.

Jupiter 8 is great but to find one working in good condition will cost you over a grand which I think unless your a collector forget it.
Juno 106 great sound but these were gigged by everyone like the Korg M1 so getting a decent one will be hard.

P.

www.jackstar-recordings.com

www.paullangley.net