I buy DE razor blades from Amazon for about $10/yr. I get the non-fancy pretty-good pre-ground coffee at Costco for ~$4.70/lb.
Just going through last year's Amazon orders, we buy bulk consumables like shampoo, dark chocolate, dog supplements, motor oil, coconut aminos, matcha, sunscreen, fish sauce, beef sticks, light bulbs, kelp noodles, AA batteries, cheesecloth, copy paper, and bubble mailers all on Amazon.
I'd much rather order online than buy at a store for most things anyway, and it usually comes out cheaper unless it's something cheap and heavy (good luck buying windshield wiper fluid online for a reasonable price).