I needed quite few GFCI outlets, simplex outlets, and 20A outlets for my house. If you've ever bought these you know they are not cheap, at least not $0.59 like the regular stuff. GFCI outlets are close to $20 anywhere here in NJ that I've been.
Started checking around online and couldn't believe how cheap the outlets were at Dale-Electric.com. I decided to give them a try. There website isn't the best in the world but if you download the pdf of their catalog you can just enter the stock numbers of what you want. They don't even give you the shipping amount when you complete your order but there is an estimate function.
My order totaled about $150 and when the shipping was added $159 was charged to my card from "Hill electric". Next day I got an email with a tracking number and the day after that I got my stuff. I have no affiliation just passing on a place that has great prices on outlets.