We've seen unmolested SMLE's skyrocket in value, as they are much less common than "sporter" versions of the SMLE. You see dozens sporter SMLE's for everyone that has full wood and barrel. While the sporters are still pretty cheap, the original ones are not at all.
I have a feeling there are plenty of guys hoarding original SKS rifles expecting to sell them off for $1500 each in 10 years. I don't see this happening really. Unlike the SMLE's,. most SKS's that made their way into Canada are left original. Or maybe they get a plastic stock thrown on them, without any other modifications. Easy to put back to original specs. The SMLE's were chopped down to make them into better inexpensive hunting rifles, when few of those were available. But the only reason in this day and age to mod a SKS is if you feel like it. So most stay original.
tEven if they aren't coming in by the shipload anymore, I think There will be a healthy supply of original SKS rifles available in Canada for a very long time.