I'm surprised Gursky is still holding the auction records - I first heard of him circa 2000, when his mural-sized prints were something of an oddity compared to today.
He also seems like the kind of photographer where you'd need to see a large body of his work at once to really get the scope of what he's doing - to, uh, 'feel it.' Kinda like seeing one Rothko alone vs. the Rothko Chapel.
And remember, it wasn't his print being sold at auction, so he probably doesn't get a piece at all.