Some metal retailers have their "cut off's" section too. A buddy of mine took over an existing metal retail business, and kept that part. Great for those projects where you need just a small piece of a certain thickness, and can cut it out of a piece they may have laying around. They usually sell it a little cheaper, as someone has already paid the price, for cutting a larger sheet/piece.
Then right next door to him, is a recycler that gets his cut off's, and used to get various metals from other factories in town. Being they have closed 3-4 of those factories in town, it ain't what it used to be..
On the other hand, 4 miles away is a major oil tank builder. They build the 400 bbl. tanks you see at collection points in the oil patch. Plate steel is right at 3/16" and some 1/4", plus other odds and ends. Lots of corner piece's out of 4' X 8' sheets, where they cut half the ends of the tanks out can be bought for scrap price. With the new oil boom going on here in SE Ohio, Penn., and WV, they have stacks of these pieces.
Between these three, I bought enough steel to build my handy-dandy fence unroller shown in picture, and had right at $25 in all the material, and some left over.
