We featured one of these way back in 2007, but it was a new one, selling for more than the amount being asked right now on eBay for this Vitra Ball Clock by George Nelson.
It's a reissue of a George Nelson classic, originally dating back to 1948 and reissued for the modern era by Vitra. It's a mix of maple and brushed metal, with a high-grade quartz clock, all powered by a single battery and sized around 33cm (diameter).
Some interest already, but with just over three days to go, the price stands at just £1.30. One to keep an eye on for sure.