I'll tell you why the Winchester M70 wasn't selling in this part of the country: They quit chambering them in the cartridges that the folks around here wanted. All we could find around here were those damn WSM's or WSSM's, and that is NOT what most folks wanted. Hell, I can't tell you how many times I was in gunshops in the midwest and folks would be looking at the M70 and it would be chambered in one of those short-fats and the guy would ask "You got this in '06" or .270, or .308, or .25-06, or 7 Mag., or .280, or 7-08, or some other "normal" chambering. And the guy behind the counter would shrug his shoulders and say "Sorry, that's all I have. I've ordered 'em, but all they're shipping are the WSM's and WSSM's." So the guy either does without or buys another brand, or a used rifle.
There are still plenty of short-fats to be found around here, but nobody wants them. The short mags are definitely killers. They killed Winchester, or at least drove the last couple of nails into their coffin.