I dont get it and was hoping for some enlightenment. Why are some pipes extremely expensive and others are much less expensive. In the pics below, one is a $16,000 used pipe from 1988 and the other is a new pipe for about $100. Would one really get $15,900 worth of additional value from one pipe vs the other? I realize some people can afford BMWs and others only Kia's. Both fine cars but I am trying to understand this better. Thanks for your patience with me.