Some people believe that there may have been as many as 400-500 grey carts made originally. This is because (as Manuel pointed out) each cart is individually numbered and I think the highest one found is in the 400 region. It seems unlikely that if Nintendo wanted to number the carts they wouldn't do it chronologically. This would mean there were way more carts made than were given to competitors and competition winners.

What happened to the others? Every so often an ebay seller will say something like "My uncle used to work for Nintendo and he gave me this" so it seems that a few were maybe given to/stolen by employees. Unfortuanely my personal opinion is that most of the extra carts were probably destroyed by Nintendo, as that's what companies tend to do with stuff they don't need. Either that or there is a big box of these lying in a basement somewhere collecting dust!

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http://www.nesplayer.com/misc/nwc.jpg
http://www.nesplayer.com/misc/index.htm
Nes player did a thing on it, H says there where only 90. and like 26 given away. This one only went for 1,600!

http://cgi.ebay.com/NINTENDO-WORLD-CHAMPIONSHIPS-1990-extremely-rare-NES_W0QQitemZ8221948690QQcategoryZ62053QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

did he relist it? its the same guy that sold it for 6,100 and the same 3 pictures with 2 new ones;

Seller's payment instructions
Paypal only, please. I will ship after payment is recieved and cleared. I can only ship to your registered Paypal address. Payment must be within 1 day of closing bid. Please email me if you need further details or pictures.

sounds shaddy to me

Yes it's a relist of the same item due to the winning bidder not paying up.

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