Hey Morgardee, I'm not sure you would get $1000 for it sealed.
If it is a US box, then it will go for a good bit of change. As well, if you were willing to go with AFA (I won't go into them here), then you would probably get $1000 for it (depending on the quality of the box).
I think he'd get close to $1000.00 for it. If it's in a CND box, he may have two people that HAVE to have one of everything from every country bidding on it. I know of two people that would have no problems dropping that amount of cash on a sealed item like that.
That's the beauty of Ebay. Timing can make all the difference. One week, you get people like you said, then the next, those people are not surfing.
That is what happened with my Sky Raven/Night Raven purchase. The Sky Raven alone should have gone for close to $55, but I managed to get both for $55.
Good Luck with whatever you decide Morgadee