99.9% of my supplies come from my wholesale supplier. The service is unmatched by any home store in my area. I call them up and ask for a box of doo-hickeys, a case of thing-a-ma-bobs and it is at my door by noon the next morning. Of course, some items are pricier but most are not. I shop HD when I need it that day and for the most part I have to go to two different stores to get it. When I ask them for a left handed gizmo they ask me for a SKU number. I've been doing business with my suplier for 20 years.
Just my two cents.
Mark