I found the whole NEC Supergrafx (only) game library (5 games!) at a used store for 100 yen each (just under a $1 USD each). Hucard games only (no box/manual), but still nice. Sold 1941 for about $200, Aldynes for just under $100, and sold Daimakaimura (Ghouls’n Ghosts]) for just under $50.
Included the other two common/cheaper games with my Supergrafx system when I sold it off. I wasn’t really using it (wasn’t RGB modded) and I wasn’t really into the five exclusive games besides GnG. Not worth keeping a system around for though. Still have my RGB modded Turbo Duo-R for standard PC Engine Hucard/CD games.
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
