Which products or types of products are good for this? Which sales sites are best out of Amazon, Walmart, Ebay, and Etsy? Are there other sales sites as well?
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Because I'm a weirdo I was looking at how much it cost to buy that pink Himalayan rock salt in bulk. You can get 55 lb of it for $56.20 plus tax. If I bought a certain amount (more salt than any sane man would buy) shipping would be free. This means I can get the salt for like $1.50 a lb. Himalayan rock salt is sold in 4.5 oz single use shakers for $5. Those people are getting ripped off, but still. The general consumer version of buying in bulk is buying one or two pounds at a time. Even then, two pounds will run you like $10.
These seem like large profit margins for ordering something in bulk, putting it in a container, slapping a label on the container, and then selling it. Am I over simplifying here or could it be this easy?