I am a former employee of Virgin Games (1990-1993) and Sunsoft of America (1993-1995).
I have a SNES test board with Speedy Gonzales El Gato Bandito on it. I've held on to this since I left Sunsoft in 1995. As far as I can tell, it is the final build, no different than the published Acclaim version.
What's this worth? I was thinking of finally letting go of it.
I also have the following, but I don't know if people collect documents and stuff like that:
SNES CD-ROM specifications document - This is a Nintendo document that describes in technical detail the SNES CD-ROM device that Nintendo had planned to release. This document was made available to publishers and some developers. It's 19 pages and dated February 5, 1992. Unfortunately it's a photocopy, but I can assure people I have had this since 1992. It has that "old paper" authentic smell to it. ;-)
Looney Tunes "HOOP IT UP" promo t-shirt. (Actually it's up on Ebay already, but doesn't seem to have much interest).
I have various flyers, catalogs, folders, etc that were given out at CES in early 1990's. (CES is Consumer Electronics Show, and game publishers showed their stuff there before E3 existed).
I have a high-level game design document outlining a proposal for "Blaster Master 3" which would have been for the SNES. It's a color laser print, dated 12-18-1992, and is 9 pages.
A print "proof" of Sunsoft's revised logo, stamped "REVISED Dec 09 1993". (Could be color photocopy. I don't know how they printed this).
A print "proof" of a 2-page magazine ad for Aero the Acrobat. (Could be color photocopy. I don't know how they printed this).
Sketches of objects and characters that were included in the games Cool Spot, Aero the Acrobat 2, Punky Doodle, and other games...
Thank you for taking the time to talkabout my crap! :-)