Microsoft employees have been trying to make a quick bob by selling Windows 2000 on auction site eBay.

According to a ZDNet report, Microsoft has warned employees and contractors that selling private copies of company software is against Microsoft's policy. But 23 copies of Windows 2000 have been put up on eBay in the past week, by people living within a 25 mile radius of the company's Redmond headquarters. While it's not certain that all these came from Microsoft staff, some employees have admitted selling their free copies.

One told ZDNet that he was selling his copy of Windows, which was given to him in return for working on development, because he didn't need it. He sold it for $1,300. Another employee received bids for his wife's free copy – sent by mistake – up to £1,335. The full retail price is around £3,400.

Microsoft declined to comment on internal policy.