They are not so rare that I would be afraid to use it.If you want the gun to achieve its potential, I would take/send it to a competent M70 gunsmith. Like all factory rifles, the trigger can be lightened from what is probably about 5# down to about half of that. They typically are bedded in a cheesy hot glue crap that should be dug out and replaced with quality bedding. Whatever caliber you bought, the barrel is about 2" longer than it needs to be, so it could be bobbed and recrowned. I have also seen them with mis-drilled scope mounting screws, so a good gunsmith might solve that by drilling them to 8-40.
It might sound like I am hyper-critical of M70, but the contrary is the case. Various Lh M70s have been my main hunting guns for the past decade, unless I want something really light. It is just that I don't expect any factory gun to pass muster (although the Tikka comes dam close.)
And once you factor in the value of the scope on the gun you just bought, I do not think you overpaid.
