Look at the cost you’re paying for Prime and consider how many orders you’d have to place to break even (using the Prime membership money just to pay for shipping when you need it faster, etc).

I exceed the hell out of that in probably a couple weeks for my business. I hate it, but I’m pinched to keep costs down and time is valuable, and unfortunately Amazon fills that requirement too well. I live in a small town, I don’t have time to dedicate an entire day to driving to civilization and back, plus fuel costs. Plus, Amazon gets it to my mail depot faster than I can get it from other suppliers, without having to pay shipping.