Over at Play, they are selling this `Nano` beater for £80 but that is for the silver version. Black is £20 more.
http://www.play.com/Electronics/Electronics/4-/911712/Samsung_YP_Z5_4GB_Silver_MP3_WMA_Player/Product.html
Most other places are selling this for over £100 and reviews on the net generally put it`s playback as better than the Apple ipod Nano, which it is almost the same size as. Most features are considered better than the nano-particularly the 35 hours playback, but the control system can be a little fiddly.
Still, my wife has been eyeing up a Nano at £120+ so this will be a nice (late) xmas pressie for her.