CULTURE BRAIN ULTIMATE FIGHTER SNES Source Code
At least, I presume that this tape contains the source code. Usually digital tapes were used for this purpose. And it looks like it’s not the first time that he sells such stuff.
MT 201 TEST CARTRIDGE INTELLIVISION
Wisdom Tree (Color Dreams) Promotional Items
Other stuff:
My Xmas gift
Nintendo RacerMate Challenge II
Sega Mega CD-R BLANK Prototype Disc