But I undercut by 1g someone who posted at 10001g, or 8001g several times this week alone. Now you just bought from me!
It's all arbitrary. Buy whichever one you want, but don't assume you have exercised some moral principle by buying a particular price level, whether the previous price was 1g higher, 98g higher, or 786g higher. Why not buy the most expensive one on the market? You will engender the greatest happiness and realize the most un-earned self-righteousness and false sense of moral superiority. Win-win!!