Pray silence, please, for possibly the most ludicrous music gadget ever to appear on eBay: Item #7354713788 is a Yamaha GX-1 Synthesizer with over a week to go, but no bid yet at US$200,000. The GX-1 was the predecessor to the CS-80. It's a mighty three-manual synth, with 135 circuit boards and tiny analog sound cartridges, which are programmed by turning minature pots with a jeweller's screwdriver. Around 50 were made, and few ever left Japan. Stevie Wonder bought two at £40,000 each. John Paul Jones from Led Zeppelin had one, as did Keith Emerson, Hans Zimmer, Benny from Abba and the Church of Scientology (but we already knew that L Ron Hubbard was an organ nut). The GX-1 also inspired one of the most wonderful articles that Sound on Sound has ever published: This story by Gordon Reid telling how he bought one through a local paper small ad in Australia and had it shipped back to Cambridge, where he had to demolish his garden fence just to get it into his house. Curiously, this GX-1 is also in Australia.