I keep it simple and have a flat rate install of $199 on
signs that I PRODUCE. If it's something stupid small I'll drop the cost.
This rule doesn't really apply to large orders. Those I bid by getting my costs and adding what I feel I want to make and be satisfied, then maybe dropping it depending on if I want to be aggressive, then raising it more then what I started because I realize I'm pretty frigging valuable and do bomb *** work and I'm real busy, then I reduce it to the original number because deep down inside I actually DO want the job. Then I quickly e-mail the bid and close the window and say, "Well, what's done is done. Can't take back that e-mail"