There are very few actually collectors of games, as Gyson said, on top of that all those boxes, special editions, etc are mementos of the games we played in the past, they sit on our shelfs and remind us of the good times we had with those games.
In that context dice are naturally a good choice for those of us who play PnP or board games from time to time, because can then have fun with those dice too. Same for the mugs who sit on the desk. A 2nd mug itself would be a perfectly fine idea as well, especially as we get two copies of the game with the collector's edition, so hopefully we can play locally with another person and share some beer with them while playing.
