Once upon a time, we had simple business procedures, that is until the banks changed all of that. We went to the bank, put our money in, and got interest. No other transaction fee's, and only very small fee's for out of the ordinary transactions, like sending money oversea's or travellers cheques. Banks decided that each transaction had to have a profit level on it, and now if you break wind at the tellers window, they want a fee added.
The god called profit has now forced it's way into every part of the business world, and there are those buyers who have unrealistic expectations, and sellers who feel it's their right to charge a large wad of money to go to the post office.
The cost of doing business was always factored into your profit, but not these days. Sellers wonder why every second day there are threads on postage rip offs, and it's simply because buyers still expect to pay the price for the item but not have added extras like $20 P & H when they know the real cost is less than half of that. I think sometimes, there is more ego about sellers being able to tell the world they have a business, than actually thinking about the common sense of selling. Three words will ensure repeat business " Postage at cost "