Apparently NCS found old stock of a number of PCE games/accessories recently. All are new/shrinkwrapped. I thought people here might be interested.
http://ncsx.com Mouse over Orphanage and you'll see the link to PC Engine stuff.
Here's the games they had when I looked:
Police Connection - Japan $15.00 Each
Mirai Shounen Conan - Japan $15.00 Each
High Grenadier - Japan $15.00 Each
Final Zone II - Japan $15.00 Each
Exile II: Janen no Jishou - Japan $15.00 Each
Dragon Spirit Hu-Card - Japan $16.00 Each
Davis Cup Tennis - Japan $5.00 Each
Builder Land - Japan $15.00 Each
Babel - Japan $15.00 Each
Kabuki Den - Japan $ 25.00 Each