I think tank is not the right word. Leica prices dont tank, they depreciate and then settle down. M8 for 1700-2000, M9 still sell for 2500, M240 for 2700-3000. In fact some have mildly raised. So M10/p/r will have an exaggerated fall initially , then even possibly slightly uptick, and then slowly depreciate. So yes the camera is much less than someone would have bought for new when released, but what value did some gain by using one of these cameras for 7-10 years? If someone places no value in time spent with camera - then you just want gear. None of these ( at least digital ) are an investment.