For a hundred fifty for a half hour, I would expect high resolution photos, glossy prints of everything, and way better photography skill than you're showing in your pictures.
There are plenty of cosplay photographers that do much better shots (and much better photo editing,) for free. Hear that? Free. It's quite obvious that the only people taking advantage of your prices are novices that don't know better and people who, sorry to say, are so unskilled at the craft that they can't GET people to take pictures of them.
So basically, you're taking advantage of noobs.
(congratulations on actually getting me to post for the first time in years)