Just so folks are aware: this kind of behavior doesn't constitute a good faith purchase. If you suspect something is wrong, you aren't allowed to push the risk management off onto a retailer just because they aren't as clued in as you are. It's the same principle that says you can't take advantage of mislabeled prices or leaked discount codes.
In this case, where it's just one item and the poster was probably willing to eat the cost, it's a no-harm-no-foul thing and it was good customer service of Amazon to refund the price. But in general this is a game people shouldn't be playing.
(Edit: and as expected everyone wants to argue based on who the bad guy is supposed to be and not what I actually said. Amazon may be bad. This is still fraud if you do this expecting to get refunds if you can't use the item. Don't do that.)