50000 sounds really high for a non major network supported ppv? That being said, they do have the IPPV option to and that probably gets a fair few buys. I bought each of the Froch cards on it except the one I was at (Kessler). They were however, big match ups in the division, and I also believe Froch is a much better draw than he gets credit for. I think he would be a big star right now if his supersix fights were carried by a big network. How many buys was Khan doing on Sky?
Froch Dirrell did something like 15,000 so I don't see any reason why Froch-Kessler couldn't do around 50,000 considering it was on at a much better time and that Primetime were more established then they were for the Froch-Dirrell fight.
15000 for the dirrell fight is good seeing as it was on at a stupid time. I remember there being a rumour that the froch/dirrell fight only sold something like 2000 ppv.