Amazon isn't an online retailer. It's something else. They don't have inventory, not in the sense that anyone can understand it. They do represent sellers (including themselves) of items, ostensibly categorized, but the search results are infuriating.

I was trying to buy school supplies, of which they had prominently linked categories, since it's that time of year. But when I searched for some package of paper, binders, or pencils, if I sorted by price, it included so many wrong products, then I never knew how to just find the best price for a given SKU. Combine that with downright scary results, I'm only left with scanning for reassuring logo's like Prime X and Prime Y.

It's a bazar full of hucksters.

[Edit] Also, I'm a Prime member, and buy everything I can there. Just the other day, I needed ink for by Brother printer. The brother ink was three times as much as the knock off. I really like Brother the company, and I wanted to buy their ink, but the budget that month was tight. So I went with the knock off. It's working fine.