As a buyer I am annoyed that the advertised price of an article often changes during the process of buying it!
Why doesn't Ebay prevent that? One ruse is to include a very cheap item in the menu; you only get the advertised price if you select that item. More blatently, the advertised price changes as soon as you select ANY item. This sort of thing puts me off using Ebay, so probably does the same for many, many other people.
