Usually shocking odds, mind. 1/10 or some @#/? like that. There's usually a surprise thrown in if you bet on the 'big' events like WrestleMania or SummerSlam. Potential for a bit of money there.
Quite like doing accumulators on WM tbh. It's a fiver and a bit of fun. As mentioned above though, it's very rare that even 5% of an audience know the outcome of matches.