You asked
Should I upgrade from the leica m e typ 220?
Here is what the site says about that.
From Leica M-E (Typ 220): Leica M-E (Typ 220): A rangefinder by Leica with a 18-megapixel full frame sensor, announced in 2012. A lower-priced M9 with the same 18-megapixel CCD sensor. Specs - Maker: Leica - Mount: Leica M - Sensor: Full frame, 36 x 24mm, crop factor 1.0 - Resolution: 18 megapixels - Stabilisation: none in the body; use stabilised lenses for slow shutter speeds - Announced: 2012 - Type: rangefinder Focal lengths on it Full frame is ...
From Buying used: Buying used: Cameras and lenses are built to last, and many photographers upgrade often. That makes the used market one of the best ways to afford good gear. A body that's one or two generations old is often most of the camera for a fraction of the price.
Quoted from this site's pages.