I fairly new to the building, but I have picked up some parts, most have been at somewhat of a premium. I'm in the process of acquiring some parts for AR's. I see several places that are having some pretty good "Black Friday" sales. Is "Black Friday" the best time to pick up parts? Do some websites offer deals year around? Is now a better time to pick "X and Y" parts and get the "A,B and C's" later?