I just sold mine for 2.4 m in 10 minutes, if that helps.
It looks like a few have sold (the average price today is 815k) so you could try for a million or so...
It's a new trivia prize, and it seems there are only 2581 of them.
there were only 2 in the shops previously at around 2.5 m, they got bought up too. i guess it's just bring the item to people's attention to get that 'OMG WANT' thing...
Oooh wow. That's more than I expected