I'll add that CGN member and M14 historian "Different" could probably tell you what such a rifle would be worth if it was actually in the u.s.
Sadly, in canada, the converted auto, now semi auto only, genuine M14 rifles, don't hold much collector value, save for those looking to have one from each manufacturer, even then, if you got more than say 1500.00 from a canadian 12x collector, you would be making out well. They have appreciated in "value" by 3 to 4 times their original selling price over 22 years.... Not so bad