It's becoming more and more difficult to figure out who you are buying from, and as a result there are outright scams sitting on Amazon's store at this moment that they continue to do nothing about:
https://www.amazon.ca/ORIGINAL-MACBOOK-Magsafe-ADAPTER-CHARG...
See that? That's the infamous "dangerous" counterfeit Apple Macbook charger that made the rounds[1][2] a while back. Notice how it says "by Apple-Computers"? This is a scam. It's not by Apple. It's a dangerous fire-hazard knockoff. Yet it's tagged in a way that will no doubt mislead people into thinking it's safe and "official". People were pointing this out months ago[3], yet it's still there on Amazon's store, no doubt along with countless other dangerous misleadingly-branded ripoffs.
This is fraud, pure and simple. And Amazon continues to profit from it, right out in the open. It's disgusting.
[1] http://www.righto.com/2016/03/counterfeit-macbook-charger-teardown.html
[2] https://news.ycombinator.com/item?id=11325150
[3] https://news.ycombinator.com/item?id=11325464