I was going to say that TSC does free ship to store, but jessmarie beat me to it. Last time I needed 4' wide, they had the best price.I do too, my local Ace guy had to order it but didn't charge me for shipping like the local TSC was going to do(which almost doubled the price-some folks just can't afford that). It never hurts to ask.
Our local Home Depot had decent prices when I was there yesterday, and TSC is having a sale right now - 48” x 100’ 19 g, 1/2”, cost about $107. I know their shipping prices are outrageous, but if you have a local enough store it can be shipped there for free.