In 2009 I walked away from an $87,000 commercial install because the GC wanted me to drop my price 22% to "match a competitor." I told him my labor guarantee alone was worth more than the spread. If his other guy wanted to lose money, I wasn't gonna stop him. Six months later, the GC called me to clean up after the other guy. Charged him 1.4x what I originally quoted to fix the bad install. The lesson: the cheapest customer is your most expensive one. The cheapest contractor is your competitor's best lead source. What's the biggest job you walked away from? And did the customer come back?