Ufc 145 did 700,000 buys, and thats largely because of Rashad Evans....
Jon Jones isn't a big PPV draw, he stats show it..
Ufc 152 vs Vitor Belfort - 450k (125 Title, Bisping vs Stann)
*Ufc 145 vs Rashad Evans - 700k (McDonald vs Mills)
-Rashad is the draw and the rivalry
Ufc 140 vs Lyoto Machida - 485k (Mir vs Nog, Ortiz vs Lil Nog, )3
*Ufc 135 vs Rampage - 520k (Hughes vs Koscheck)
-Once again a bitter rivalry and Rampage was still popular
Ufc 128 vs Rua - 490k (Faber vs Wineland)
Rashad has eclipsed 1 million twice, Ufc 92 (Griffin) and Ufc 114 (Rampage), Ufc 98 (Machida) had 635k PPV buys..
"Dave Meltzer of The Wrestling Observer reports that the event, which was headlined by the grudge match between Ultimate Fighting Championship (UFC) Light Heavyweight Champion Jon Jones and his former training partner Rashad Evans, pulled in a very impressive 700,000 PPV buys, up 200,000 from his headliner at UFC 140 opposite Lyoto Machida, solidifying Jones as the UFC's newest top draw."