It never ceases to amaze me how many quibble over a couple of dollars here or there,

Then obviously you were never so broke that you had to count every cent.  People agree to pay postage because they believe that the postage quoted is what it costs, and if they want the item that is only way to get it.  Yes, I am sure it is the same people who are upset if the item is not as described and they have to pay return postage; maybe in many cases it means that once they pay the return postage they cannot afford to purchase the item elsewhere.