Poly's were brought into canada 10+ years ago.
Back when the 'soft' bolts could be an issue.
If it's heel stamped.....I'd pick it up for my own collector value, side stamped the receiver is still a forged so that is a bonus.
Basically it fits into the whole Norc catagory, so check headspace, shoot it or mod it.....it all depends on you wallet.
The question is......is it 100% stock, or has it been worked on, GI stock, gi bolt, gi barrel.
Considering there are few norcs available at the moment......it's probably a fare price.
GG&FB