For $13 I’ve purchased 100d6. They’re casino-dice and have a different balance since the dots for sixes remove more material than any other facing. This changes the weight distribution of the die. Casino die are properly balanced for no bias to any numbers. If figure for $13, about the normal price of a 7-die polygonal set, 100d6 means I never have to look for matching d6 again.
I like my dice to match when I roll a bunch of them.