I think that the definition of a "good old game", at least as far as GOG is concerned, is any respected, out of print game that can be sold for less than $10

I'm thinking, that GOG will probably put any 'newer' game that the publisher accepts to be in the price range on here, but I still believe the game must be considered either an older title or a title that did not receive much play or much limelight.
I would certainly love to see Max Payne as well.

I don't think we should be too picky. After all, I'd love to see games like Beyond Good And Evil on here. It's about as old as Soldiers:HOWW2 and is certainly a classic.
Hell, I'd love to see Max Payne 1 and 2 on here. The more people that play MP1 and 2 the better. But they're both on Steam for $14 each anyway. ($20 for both).

From Win95 to actual publisher budget lines, for me.