Very interesting thread. Loosely along these lines:

I have done all kinds of different things for people over the years. I have learned that discounting a price is not a good modus operandi. I either do things for full price or for free. Discounting the price results in people considering you to be cheap labor. What I have happily learned over the years is that doing things for free will more often than not, bring more in return than the job was worth.