There seems to be quite a lot of rare older gaming hardware on ebay at the moment and I just discovered this auction.
http://cgi.ebay.co.uk/SEGA-DREAMCAST...QQcmdZViewItem
It's for an Original Sega Dreamcas Katana HKT-01 development kit, as used by the games developers. It also comes with the never released source code for ECCO II: Sentinels of the Universe.
Currently it is only selling for £107 which is a bargain for such a piece of gaming history.