@Evalu8this, I agree with you regarding the MSC taking advantage of shoppers. They're not the only ones who do it either, but it seems to me some of the emails/descriptions of shops are deliberately misleading to trick inexperienced shoppers into taking jobs that don't pay nearly what they're worth. How many times have I gotten emails about an "easy" or "quick" car dealership shop with a "great pay" of $17.00??
I haven't done the audit the OP is mentioning but I've received emails for it, and after seeing the fee, I'd never have thought it was as extensive as he/she is saying.
If I accept a shop from any MSC that I feel is underpriced after reading the guidelines and report, I immediately contact the scheduler to cancel it, and I explain why. I don't care if it's due the next day or next week. I value my time, I know what it's worth, and my minimum rate is firm.