Greetings sharks
Theoretically how much would a world championship event distribution cart go for on the market?
I'm not selling one but I can assure you that at least one from some year I won't say does exist.
ROM dumps of any given year are more likely to exist and probably do in the silent hands of a lucky few. Possibly all of them were dumped at some point in a back room by a crafty employee / volunteer, possibly by more than one person, and possibly not one person has every single year.
Someone working as staff at the WC almost certainly would not have been able to steal a physical cartridge without having gotten caught. However, if an unknown assailant broke in and stole the cart, they could have kept it and made a clean get away. This might have happened at one or more years.