That's a tough one. Too many variables.
Anywhere from maybe $400 for a newer one that is scarred and rough to as as much as $2500 or more for a pre-64 in excellent+ condition.
Good choice though. I have a ~25 year old .30-06 model 70 XTR Featherweight in .30-06 that I wouldn't part with.
I didn't fight to defend your freedom so you could vote to take away mine.
"A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself.
John Stuart Mill."