Actually, even though there are only 1000 sets, there are really more Sweeps (3000) than Banzai-Trons and Skyquakes (1400 each) and Razorclaws and Elita-1s (2000 each). I'm thinking a lot will keep all three, but you might see a lot of single ones on ebay for people who just want one.

As of the end of the Friday, they have left:
Sweeps - 264 sets.
Banzai-tron/Skyquake - 240 sets.
Razorclaw/Elita-1 - 640 sets.