make bank here........ I can tell you from my experience with making product that the price has a lot to do with the number of units. On domestic cars that make thousands of parts because they are interchangeable with MANY MODELS and MANY Years! When you make a small production run of anything it costs a fortune to tool up. I am sure this is a large gamble for Mark and he will need to sell way over a 100 units before he even starts to make any money.....How many of these gear sets do you thing Mark will sell over how much time? Mark wants to have set of these gears for his own car and making a one off set they will not even consider. Mark is doing the community a huge favor to even get them to be available. You can not base a price on something that is mass produced with something that is a small production run. Hope that helps :)