You very clearly articulated what has been happening with the brand in North America and probably elsewhere. You can't just adopt the strategies of your competitors which have been put in place over many years and supported by infinitely stronger brand equity.
You have only one piece that sells above retail in the secondary market. Maybe a couple more (excluding unique pieces) if you go back to the early days. The gap between the flagship Lange 1 retail price and the aftermarket is staggering and keeps growing. Don't pretend that you are PP please!