It could contain its own user manual.

I had this happen to me, and the amazon.com seller offered a refund of $5 for taking the negative review down. I didn't. My favorite part was when they complained that the review made their rating go down. That's the idea.

I ended up calling Amazon and saying, "can they do that?" It turns out they can't under the Amazon merchant agreement, according to the customer rep I got on the phone. Report it if this happens to you.

As a buyer online, I have an obligation to report what really happened to me, not remove that report for money.

It's a double obligation to:
- warn other customers that they might have the same experience.
- let the store know that I had a poor experience. If they really care, they will want to fix it.

Caveat emptor doesn't work when you're being bribed to silence.