Lol you really should clarify that, and maybe say his username. He has valid points... come out blunt... but it is what it is. To some they're ok making a quick $500 profit rather than sitting home. I mean I did take a $450 job a few months back, to drive 1 mile from my house to a venue and set up 2 sparklers for the first dance. 10 minutes later I was broken down, home 10 minutes after that, and on my way to dinner with the wife that was fully paid for. The call came in the week of the event, so all in all I gave up just under 2 hrs. But $550 FOR A 4HR WEDDING?? Pass.
I just think it's not right for you to criticize him either on the fact that he doesn't display much. While I am of the belief a forum works best for all when there's transparency and the sharing of different methods and examples of our work... you don't really share details when they're asked of you either... and can sometimes go pages without you responding to something asked multiple times.
Now, I'd ask for your contract as proof of how you handle your business, payments, and prices for your services... but something tells me there is no contract anywhere. Again... just don't feel it's fair to criticize anyone when you're almost doing the same.