People in the US don't like warm milk.
There are plenty of accuracies in that statement in regards to my wife. She doesn't understand why I don't try to barter. Everything is to be opened before purchasing, much to my embarrassment, and sometimes chagrin.
Here's one observation:
One-upmanship....Whatever you have, I will have something better. Not only is it better, but I paid less ( or bartered it ). This applies to cars, jobs ( work less, yet earn more ) housing, doctors, hardwood flooring, cellular phones, oriental rugs, satelite TV, homemade pierogies, dogs and cats, and anything else under the sun. There's always a better place to shop, that costs less and has better quality and service.