I am a nc programmer and have worked in a machine shop since i was 16. With the work that must go into the pins for a tube mold, I would say a fair price would be the cost of the mold plus thirty dollars for each pin. That is the reason I suspect he quit making them. It would be more than most would want to pay, but to be honest it would still be a bargin for the amount of work he probally has to put into them.