I recently got lazy and casually gave a verbal number off the top of my head that ended up being a couple of hundred too low and was asked "what caused it to go so so high?" I hate that and won't ever let it happen again.
I made the same mistake a few days ago [first and LAST time] I ended up making no money on the job, only walking away with 1200' of #8 THHN [worth over $600] and knowing the fact that the customer has much more work for me in the near future. I ate it this time... From now on: written quotes only.
~Matt
