Thanks for all the responses. I might actually be going to Montreal (the city where seller supposidly is) this weekend and if they say that I can meet then i`ll check it out, i`ll be with a couple of photographers too so they could inspect it too.
I`m more set to let this deal go but if I can see it in reality then who knows, maybe i`ll be lucky, but that`s like a 1% chance..à..
Check this link from the Montreal Craiglist:
Someone is advertising that his 6D was stolen. The stolen camera may well be the one you're thinking of buying. If I were you, I'd stay well, well away from this so-called "deal". If the seller is in Montreal and wants to sell a camera, why doesn't he or she advertise it on the Montreal Craiglist or Kijiji instead?
At the very least, if you feel you absolutely must go to look at the camera, please note down the serial number from the Craiglist ad and check it carefully against the camera for sale.
But honestly, you'd be better to stay away.