I have them sorted red and yellow so I get a few bucks for 5 minutes work. I an certainly not making that anywhere else OTOH if I bought these at Home Depot it is probably more like $15-20 and now I have a lifetime supply for the little bit of stuff I do these days.
Not only does that waste money but you have to figure in the time you spend buying stuff. I tell my guys not to waste stuff not only because of the money value but some stuff like screws and respirators etc I have to get at Home Depot and I really hate spending any of my little spare time at HD. They get to go home and spend time with their families while I get to go buy all the stuff they wasted and sort out the corners of the trucks where they tossed all their leftovers.