the worst thing about using ych.commishes* is the recommended prices they suggest you use for your auctions. These are absolutely terrifying and I hope nobody out there is actually pricing themselves like that!
*if you know of a better site to host YCH auctions on, I'm all ears! I have galleries in multiple places and need a third party so people from all my galleries can participate. So far this has served that purpose well enough, but I'm always up to trying something new if it's better!