Check Raspberry Pi Cameras from Amazon when you get them

I ordered a camera module from amazon it couldn't get it to work. It looked new, but the bag wasn't sealed. I researched the error and found dozens of posts about modules failing for various reasons, usually static discharge. I submitted a return request and ordered two more. They arrived today and only one works. I'm guessing the two bad modules were previously returned and resold, and it'll probably happen again. If you buy from amazon, check them as soon as you get them.