That is a new type 700 mountain rifle which retails for 1100 cdn$
The price seems excellent. Ask what he did to it (trigger or bed or?) and why he's selling it.
If he didn't like how it shot, and didn't bed it or drop the trigger, then it's most likely a great deal.
Some remington owners give up real quick, blame the gun, sell it.
The next guy comes along, drops the trigger weight, beds it, hand loads for it and makes it shoot.
650 is a steal imo