UFC 133 310,000 (vs. Mike Pierce)
UFC 141 535,000 (vs. Jon Fitch)
UFC 154 700,000 (vs. Martin Kampman)
UFC 132 320,000 (vs. Kim Dong-Hyun)
UFC 143 400,000 (vs. Diaz)
UFC 154 700,000 (vs. GSP)
It is hilarious that you use fights like Hendrick/Pierce and Condit/Kim as if they sold those PPVs. Yea, UFC 141 didn't sell because of Brock vs. Overeem. It was all because of Hendricks/Fitch.
Your logic is laughable.
No, Diaz/GSP didn't sell much more than vs Shields or Hardy. But if you would do a little more research you would understand that the golden era of PPV sales as passed. 500,000 buys is good numbers these days. 500,000 a couple of years ago would have been a very average PPV. People don't buy PPVs as a whole as much as they used too. Streaming and the amount of events is probably a good reason why.