Well if his house burns down(god forbid) and his homeowners insurance finds evidence of botched electrical work, they may have an issue with covering him. It i truly frusterating to me, the amount people will pay an auto mechanic, or plumber without hesitation, but when you dish out a price that's higher than a handyman's quote you are the bad guy. the flip side is that handy man doesn't have the on the job training, and required schooling to be an electrician, or the proper insurance to cover his gaf's . Selling your work is not simply about installing a light fixture, it is about peace of mind. your customer can sleep soundly knowing you checked the wiring was not brittle, and that you secured that ceiling fan properly etc. Honestly if a customer wants to bargain shop I'm positive electrical work is not the place to do it.