Quoted from kaneda:
Yeah but what if John underpriced the game because he had no idea how much was required to get it right?
I guess that would be his fault then.....
Build a prototype, know your BOM, produce the game, and price it to make a profit. Even if you do all of this in that exact order it is STILL hard to find sustained success in pinball manufacturing. Remember, making pinball machines is *hard*.