VIA has their annual sale on with fares (they say) up to 40% off. Discount Code is CANADA. Corridor deals are very specific days and trains but still some good buys for those that plan to visit.
The bad news, "CANADA" doesn't apply to Sleeper Plus service. The good news is that the classic Sleeper Plus bargain deals are back. Nothing west of Winnipeg, but it's a start.
I'll check again in January. In the old days you could often snag roughly 40% off.
I think I can persuade my spouse to do it. I've done it with my mom and with my son. The Budd equipment isn't going to last forever. But then again, neither am I.