Your M70 was made in 1957. It's retail price back then was $125.00. As a pre 64 mod 70 it has collector value. How much depends totally on the condition it is in. the 30/06 rifles are the most common caliber, and because of this, they are at the lower end of the value chain of these rifles. You state it is in "good" condition. NRA rules of firarms condition ratings, say a "good" rating is "wear evident on the metal and wood parts, some rust many be presant, as well as minor pitting. Dings and gouges in the stock, but all parts are preasant, and the gun is operable. M70's standard rifles in 30/06 that only make "good" bring less than $750, and the action alone is worth $500.
What I am getting at is the reason you have not been able to get a "straight answer" as to the value is based on the condition of these rifles. From "New in the box" that might bring as much as $3K, to one that is worth basically what the salvage value of the parts is, or around $500. I suggest you familiarize your self with firearms condition ratings. Remeber, less than 95% rating condition will hurt the value quite alot. Collectors want pristine guns, and are willing to pay for them. Well used examples bring considerably less. www.stevebarnettfineguns.com
is a site you might want to check, As well as www.cabelas.com
(click on "gun Library") you will find many very nice M70's and prices there for collector grade rifles.
Please post some pictures of both sides of your rifle and full length shots as well as detail shots. With these we can have an idea of the condition of your rifle. This will let us better determine what it might be worth. We hope to give you a "straight" answer for yours if you do.
Best regards, Kirk