I would buy 1 or 2 sets.  Chasing the black die around the table was super annoying.

I'll definitely buy another set of dice.

I'd buy four more sets of dice. Two more would be a must!

 Yeah i would pick up a 2nd or 3rd set. 

I would definately buy at least 5 sets.

 Agree wholeheartedly with the RPG comment of trying to play with only one set of dice.

I'd probably get 2 more sets, maybe 4 depending on the price.

 Depends on the price, but…at least 2 more sets.

TK

I bought four extras sets for D1 and 4 sets of the gold/silver dice too.

I'd be in for four sets for D2.

Cap'n Frank

Definitely buy at least two extra sets. Maybe more.

 I would buy a set.

I would buy multiple sets as well.  We used two sets when we played (2 copies of the game), and peole were still scrambling for the dice.  I am not sure why they don't take the RPG approach and market the heck out of these things:

- sparkly dice

- gothic looking symbols for the Overlord set of dice

- swirly dice (everyone likes swirly, right?)

- etc., etc.

 Created an account just to respond to this thread. Got my copy finally this week and the first thing I thought upon unboxing and reading the rules was would be nice to have extra dice. Would ideally have a set for each player. So would buy four sets.

 Minimum of 2 more sets. From there as many as needed to keep game flow going. "Who has the blue die? OL, can I use yours?"

While you are waiting, just do what we do. They are all six siders. Created a simple chart in word with the numbers matching sides. Roll some normal six siders and compare to the chart. Easy peasey.

 I would definitely pick up 2-3 sets.  I have players who tend to "lose" their dice in all their table clutter and waiting for them to gather them up can be irritating.