So, when I went to the VIA site just now, I clicked on the "tickets" tab on the home page and put in "Vancouver" as the origin point and "Jasper" as the destination, and specified one adult departing Monday, 3/13, with no return date. I was quoted the following prices, taxes not included:
-- Lower berth, C$585
-- Cabin for one (roomette), C$882
-- Cabin for two (bedroom), C$1,323
-- Prestige cabin, C$4,040
To convert to USD, knock off about 25 percent, so about $662 for a roomette and $992 for a bedroom.
I didn't have to log on to get the quotes in Canadian currency. All of these, except Prestige, were listed as discounted fares. When I tried the preceding Friday's departure (March 10), all of the roomettes and bedrooms were sold out. I did notice previously, when I was looking at prices for a possible trip this winter, that the Friday departures from Vancouver seem to be much more heavily booked than the Monday departures.