My internet's been down for a good week now, so I don't know if this is old news... but it looks like bullseyes_videogames_collectibles is selling a Duo-R + Sapphire for only $525.
It looks like
they're now peddling the bootlegs as the real deal.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8194304912&ssPageName=MERC_VI_RSCC_Pr4_PcY_BIN_Stores_IT"Also Included is the game:
Ginga Fukuei Densetsu Sapphire. It is very rare to find, especially COMPLETE In Original Case. Game Disc is in MINT/Brand New like Condition, Instruction Booklet is Mint (Maybe unopened/untouched since these type of games can played without knowing anything), and Case is Excellent condition (some shelf wear and one crack on backside). Have had a couple questions if the spine card is included, when I got this I did not know that they existed or what they were, and I don't see it here so the answer is no, so Back of the Case says copyright 1995, so it is in gem condition for being that old. Heck, I still see these selling for over $400 for this game when it actually is listed (hardly ever), so this is a bargain. In order to play this game on the system you must have (OR BUY FROM US) the PC Engine ARCADE CARD DUO we have listed in another auction."