The fact of the matter is that steel prices are not uniform anywhere in America. The price of any given piece of steel sheet, or extrusion, or tubing, or any of a dozen other factors, determines the price.
Are you buying one sheet of 4x8 14 gauge cold roll steel, or 10 sheets, or a pallet, or a truck load? Are you buying one stick of 2x2 angle iron, or does the railroad flat car stop within forklift distance of your shop so you can unload your 100 TON shipment?
Perhaps we should start a thread about the price of gasoline. I am sure that the poor slobs who are stuck in CommieFornia would LOVE to know the price of unleaded regular in Kentucky, because they would hop into their cars and trucks and drive the 4,000+ mile round trip JUST to save $50.00 on a single tank of gas!
Oh, I know. The price of steel that is not within the logistical reach of your shop is important to know, because you might be willing to pay for the shipping charges to transport cheaper steel across the country, or drive there to pick up the steel yourself.
The price of steel is determined by the quantity of steel that you purchase, regardless of WHERE you purchase it.