There has to be at least one option at a dollar but it is usually the least popular item. It is not against ebay rules if it is somethig like phone covers and all the options are for that item, the ones I find most annoying are the ones for clothes where it says a dress is five dollars but when you look into it that is for a pair of gloves or tights and the dresses are a hundred bucks, that isn't allowed as they are different categories and I have seen them removed after I have reported them.

Obviously they have found it effective but that can only be if buyers purchase from them, personally if they list like that I don't buy even if the option I want is a reasonable price.