stadium events sealed goes for around 10k a loose cart goes anywhere from 500- 1500 the manual and the box are where the money is. the 1/2 a million was a joke people were just bidding it up for a laugh. even the one that was 45k was bid up as a joke no one bought it and it was relisted
those ducks hunts are worth much much more as games then you would ever get from the gold content.
even the cheapest of cheap commonest game like Silent Service is still worth a heck of a lot more as a game then the gold content
Edit to add*
a Stadium events PAL version goes for the 200ish price loose quote but the NTSC version is the rarer one