Got the Yamaha DSP-E800 plugged in and working today. Despite being 15 years old the build quality and aesthetics are a bit better than current modern Yamaha AV receivers and I've always preferred the warm look of the old amber displays over the cold white/blue tint of the new Yamaha's. It's also quite slim which looks smarter than the normally huge proportions that AV receivers have.
It seems like a good bit of kit with good sound quality. The menus and remote control are fairly straight forward to navigate after just 10 minutes of fiddling and all of the functions can be accessed without needing to connect it up to a TV which is handy. The DAC section seems to be audibly transparent or at least so close that I'm not sure if I can tell any difference between the ODAC and the Yamaha DAC. It also has a dynamic range compressor which is often useful when watching loud action movies.
For £8 (plus £13 P&P) it was a real bargain. The usual price for these is around £50 give or take a few quid and it would be ideal for anyone looking for cheap DAC/pre for a pair of active speakers. So far it seems better than the Nakamichi AV1 and the Teufel DecoderStation for simple audio duties (if you want video it doesn't have any HDMI which might put you off).