The WWE released their February 2013 Key Performance Indicators at this link. The company is reporting 719,000 total buys for the current quarter. With The Royal Rumble doing 498,000 buys in January, that would put February's Elimination Chamber pay-per-view at 221,000 buys.
The number is up from last year's show, which did 178,000 buys. This year's event was headlined by The Rock defending the WWE Championship against CM Punk.