Papers seem to have become crazy expensive.
Some of the importers (Hahnemuhle for sure and given the vagueness of the Canson.ca website likely as well) are based in the USA and seem to be a victim of US import tariffs. There seems to be little we can do about it. As I still have good stocks of sheet and roll papers, I am okay for now.
I have used Canson Platine, but found the paper surface to be rather fragile and easy to mark. Some people love it, but I am not planning to buy more when I run out. I still have a bit of the origninal Canson Baryta, which I prefer to Baryta II, even though the surface can be a bit of a problem (bits fall off after printing, leaving white spots and ruining the print).
I am pretty well only using Hahnemuhle Photo Rag Baryta instead of the Canson Infinity Baryta Photographique II in my gallery prints. I often buy directly from the Canadian importer Amplis Photo in Toronto (
https://store.amplis.com/collections/hahnemuhle ). They bring their product in from Hahnemuhle US.