The song 'Tics' by Brad Paisley comes to mind
I used to Work part time at HD years ago. I put every penny I was allowed into the Employee Sock Purchase Program, and gaind quite a bit of stock (back when it was doing good and would split 3/2). I've sold some then, to help pay for some large costs, such as a $5000 transmission rebuild. I still own quite a few shares (which are not worth nearly what they were pre 9-11)
I could give alot of insite in the inner store workings, but it is irrelevant here.
I agree that some of their items are marked so that one couldn't return it to a supply house after purchasing it at the box store.
Another example is a Cutler Hammer A/C disconnect. I am a CH installer. The part number at HD has an adder in the part number and HD's price for one is far better than my break price at supply house.
And HD carries only a few Cutler Hammer items now.
For me, NM 14/2 and 12/2 are the only wire that is less expensive to purchase than at my supply house, and typically it is @ $3 per thousand respectively.
HD does not change their wire pricing daily, as my supplier does.