I found a copy of silent hill complete for the ps1 - 5 bucks.

Then I found this japanese dreamcast disc (and case artwork) that looks somewhat unique.

It says sega confidential on the cover - dreamcast system-disk

on the inside its a "gd-rom" system disc2

then says s-3527.

-5 bucks.
Did I get a good deal on something out of the ordinary?