"He who marches out of step hears another drum." ~ Ken Kesey
The only time I've ever adjusted a quote was immediately afterwards after finding a mistake in my math or something I forgot to add in, such as an upcharge for 2X and larger shirts. I also make sure to include sales tax, or the necessity of a tax exemption form, so they don't feel "misinformed" when the bill is presented. If I find an error once work has begun, I eat it. I think these companies that lowball to win a bid should be held responsible to honor the bid. All this crap you read about governmentally-financed projects having "cost overruns" that aren't the result of a change of specification mid-project, but of a low-ball bid, should be resolved in court with the contractor forced to perform. Why the governments roll over is beyond me, except they squander money since it isn't theirs anyway, and they can always raise taxes or borrow more.At the end of my lease on my commercial building, the landlord, a prominent company in Orlando, pushed me to renew, and they were willing to drop my rent. The leasing officer flat out told me they wanted to keep me as a tenant because I was never late with my payment. WTF?? I always thought that was how it was supposed to work.