In the UK, the Daily Mail Reward scheme is giving an e-reader for 8,000 points. It has a 5 inch colour screen, and can play video and audio as well. Supports a number of different book types including epub and mobi. Would take 32 weeks to gain that number of points to get it free. For those in Scotland with daily points it would take less time. 2800 points would get you a £10 voucher so the 8,000 is roughly the equivalent of less than £30. It also comes with an 'executive' case as well.
There is no mention of the e-reader make, but it does seem good value compared to the prices of other e-readers.