What is it with Dry Cleaners??

Why is it that no dry cleaner in the world (except those one price for every piece ones) can provide customers with a price list for services? I've been searching for a dry cleaner in my area that has reliable alteration services and NO ONE can give me any price list for different services! How do I know that they are charging me the same as the guy behind me in line? Am I crazy to want to know what I'm going to pay when I pick up my garments?!?!