Being an old geezer who grew up with REM 751s and 722s and owning 1 of each action at the moment. Experience with the 722 says that its a great hunting rifle, (my 222 had 26" barrel). The 300 Savage is quite unique and a great cartridge.
Value wise the rifle is worth as much as or maybe more than a modern 700.
Regarding the scope, I have no idea of value other than to suggest that it is a good one. Grew up with Unertls also, though the target models.
My 721 is now a 270 Allen Magnum.
My 722 is now a 6BR
Both are great shooters.
My appraisal would be, at the right auction with the right people, conservatively (antiques road show speak) it would bring $475.00 - $570.00 with no deduction for the receiver sight cut out. That was a common modification back in the day. I still have the Lyman "peep" sight that my dad used on the 721.
Just my "biased" opinion.