An original Microsoft Xbox, modded with an Xecuter 2.7 modchip (which enables you to switch between different BIOSs, boot to different dashboards, etc.) and upgraded with a 160gb hard drive. XBMC (Xbox Media Centre) is installed and set as the default dashboard, as I got this Xbox to use solely as a media centre. XBMC is chock full of codecs, so it will play just about any type of video file you can throw at it, and it will also play music and display photos. The 160gb HD gives you plenty of storage space for files, but it will also play files from a CD or DVD in the drive, or from a shared folder on a computer or network hard drive via ethernet. It's also a region free DVD player.
I've had this for a couple of years - bought it because I wanted a network DivX player for the living room and couldn't find a DVD/DivX player with network features for less than £300 so getting an Xbox for XBMC worked out a lot cheaper and XBMC is just a fantastic piece of software.
The Xbox comes with an official video cable plus scart adapter, a power cable and an official DVD remote and receiver. (There are no controllers or anything else included as it has only been used as a media player.)
Asking price is £25 (the hard drive alone is worth around that much)
Shipping will be £8 for delivery with DHL using Parcel2Go (or buyer's choice of postage, or collection)