Certain huge items are obnoxious to purchase, evaluate, and then return if unsatisfied -- like 80" LCD TVs. Not sure what percentage of Amazon that is.
Also, many people feel "bad" about buying and returning. The "buy 3 pair of shoes, return 2" where you know you'll only keep 1 from the start feels dishonest in a way, although I'm more than happy to return something which isn't as described or is otherwise unpredictably unsatisfying.
I actually do a mental calculation before buying something which I might return, trying to figure out if Amazon is better off by me buying it (given my odds of returning it, and the costs/residual resale value if returned), and if the return is due to a bad description (Amazon's fault, and thus ok to return if the product turns out to match the wrong part of the description, like when it is internally inconsistent with the photo or whatever).
"Which of these two should I buy" is sometimes addressed by buying both, but buying 10 items and returning 9 is probably going to get your Amazon account flagged at some point.
Also, many people feel "bad" about buying and returning. The "buy 3 pair of shoes, return 2" where you know you'll only keep 1 from the start feels dishonest in a way, although I'm more than happy to return something which isn't as described or is otherwise unpredictably unsatisfying.
I actually do a mental calculation before buying something which I might return, trying to figure out if Amazon is better off by me buying it (given my odds of returning it, and the costs/residual resale value if returned), and if the return is due to a bad description (Amazon's fault, and thus ok to return if the product turns out to match the wrong part of the description, like when it is internally inconsistent with the photo or whatever).
"Which of these two should I buy" is sometimes addressed by buying both, but buying 10 items and returning 9 is probably going to get your Amazon account flagged at some point.