Best I can tell, the 94 you're referring to was made in 1971. I also have one in the same (3770xxx) range and called Winchester for the manufacture date some time ago.
As for quality of this vintage, the mechanics seem to be fine and mine is plenty accurate, but the metal finish is pretty poor. Even though I kept mine clean and coated with a thin coat of oil it still managed to get those tiny little rust spots all over the reciever. The barrel bluing seems better for some reason and it never rusted at all. Could be that it was just a fluke thing, but none of my other firearms had this problem.
On the pricing, I see the post-64 models in good-very good condition for around $250 and on up to about $400 for minty condition.