I bought a lens for my camera from Amazon.com It was a 12mm f/2.0 lens that was priced at $704 The package shows up today. The box was the right box, but inside the box is a 17mm f/2.8 lens that's worth about $150. Warranty card is also missing. My guess is that somebody bought both lenses, put the cheaper lens in the box, returned it as if it were the expensive lens, and basically defrauded Amazon, getting a $700 lens for $150. So, I call Amazon, looking to return the incorrect lens and get the right one sent to me. Problem is, the lens I originally ordered is not in stock, and the street price has recently shot up by about $100. Here's what they do: They offer to buy me the same lens from a non-Amazon vendor (at a $100 premium to what I paid) at no additional charge to me, including free expedited shipping. They provide me with a free shipping label to ship the wrong lens back to them. This is how customer service should work. I didn't have to argue. They made me completely whole, going out of their way to acquire the lens from a non-Amazon source at a higher price than what I purchased it for. They paid for shipping both ways. There is a reason that Amazon is so successful. I buy a lot of stuff from them. After this, I will buy even more.