The UFC will be putting tickets for UFC 91: Couture vs. Lesnar on sale now and it is expected that the event will be one of the biggest in MMA history.  In a press release UFC president Dana White was confident that it will be the case. “Our estimates project that UFC 91: Couture vs. Lesnar will be the highest grossing UFC pay-per-view event in history.” Tickets can be purchased at UFC.com for the return of Randy Couture to the UFC after almost a year away from the Octagon.