One thing to consider: Population and wealth growth--especially in Asia. The demand for all things Leica will never go down anytime soon.
This is true, and I have heard several times, from independent sources, that the trend in China (still growing at 10%) favors authenticity i.e. the Chinese consumer is quickly moving away from discounted knockoffs, and there is a new pride associated with owning high-end, brand-name products. If you couple that with abundant cash flow, the Chinese market alone will support quite a lot of price inflation.