I tried to buy and/or trade for a used Leica m10 Monochrom. Around a $6000 camera. The first time I noticed there were many spots and dust on my images from a filthy sensor. The camera was sold as new. After some back and forth with MPB ,they assured me the sensor was cleaned. Now the camera in question has a dust detection function on the menu, so MPB has no excuse to sell this as new. I needed the camera for a trip so was stuck. MPB said “there is nothing we ca do, and I could return the camera.” I couldn’t return the camera bc it was necessary for my trip. Weeks later MPB has done nothing to resolve the problem.