I’m ordering some cat food, which for some reason is always out of stock in the local store. By using Amazon, I’m going to pay shipping, but I get a break on the tax, and I get my A9 discount, plus I get 3% bonus points on my Amazon Visa, and so it all works out okay.

But really Amazon, I don’t think I want to take you up on your proposed option. I clean that cat box, and I know what the food looks like after it has been used.

A screen capture of an Amazon page for cat food that has a button offering to get it for less by buying it 'used'.