>In the market for a new slave girl
>Arrange for the local slave market to coffle 3 of the cheaper ones I have picked out together, alongside a few hours with them to help figure out which one I ultimately want to take home
>They can start by doing their best to beg to be the one permitted to suck my cock first. Only one of them isn't being sent back to the market, and competition can reveal a lot about what my new property will be like

Question more for slaves, but how would you attempt to impress your potential future Master in this situation?

Try to fight the other girls? Break down and just be your completely pathetic self? Immediate attachment and devotion, "please I'll do anything to spend the rest of my existence with you Master!"? Lots of different things a slave can do, and no way for her to tell which one this complete stranger would be most receptive to. She'll likely just have to be authentic to how she really is.