Now this is definitely one of those items for completists or the super hardcore collector. Currently up for grabs on eBay is the uncommon Tokyo Game Show edition of Rockman EXE 3 Black, a pre-release variant of the game that was limited to only 1000 copies, distributed a month ahead of Black's retail release on March 28, 2003 in Japan.
Three things separate the TGS edition from the standard March retail version: one, the cartridge came preloaded with special data; secret Battle Chips already unlocked. Two, a holographic Shadow Style Rockman trading card was bundled with the game, and three, to distinguish the TGS version from the retail version, the packaging lacks the gold CESA Game Award emblem present on all copies of the retail version.
While it is a rather interesting item, I don't recommend it to the casual collector. Nevertheless, you can purchase it here for $169 USD. The seller is willing to make an offer, so perhaps you can get him to knock it a bit.