Last time I counted, Maria (my SO), had around 2400 in her collection. That's counting collector's casino dice, weird dice from games like Uno dice, poker dice, tarot/rune dice, etc. It takes up like 17 shoeboxes in the closet. Scary...
I have 1. You heard me. One. One freakin' die. A black D20 with white numbers. Right now, my one and only die stands on a small mirror so I can say I have two, but that would be cheating i think
I always plan to buy some dice but I never have a chance so here I am, rolling my friends dice. Heh.
I'd guess I have in the 300+ range. What can I say - I like dice. Every convention I go to, I need to buy dice. At least a set. Sometimes many, many more.
Of course, I also played most of the GW games, and so have something like 150 or more d6's. *sigh*
And then there is DragonDice. I didn't count that, as I've got way, way to many of them. It seemed like such a good idea: Gamers love dice; collectable dice; game to play with said dice. Oh well...