Leica M6

In need of some advice.... This is my Leica M6 which I bought back in 1996 when I got a job with the UK's oldest daily broadsheet (don't quote me but I think that is correct!), been thinking about selling it.... Yes or No?

PS - I used this camera to photograph Donald Dewar as he was being sworn in as Scotland's first First Minister (the only photographer allowed in to do so, due to the fact the Leica was/is very discrete and quiet.) History in the making or should I say made. :)