In my 1963 Shooter's Bible, which cost $2.95 when I got 50 cents a week allowance, but I bought it with money made from mowing neighbor's lawns.

M70 was $139.00, worth $800 beat up but original today. =3% per year appreciation compounded annually. = average for a gun, Gold, or a guitar
R700 was $139.95. worth $400 beat up but original today. = 1.8% per year appreciation compounded annually. = very poor for a gun

I am buying them both. The Rem 700 cost more to buy and build, as I put on a new scope, barrel, stock, trigger, bolt, extractor, and I have have to make pillars and bolt knobs.
The M70s only get a new scope, barrel, and stock. I do have to make an extractor cut on the breech.
The R700 trigger, bolt, and extractor, cost more than the $400 gun purchase difference.

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1949 M70 30-06 cost me $775 in 2018, is now a 280AI

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2000 R700 270 cost me $400 in 2014, is now a 6.5-06

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps