Yes I did (C$508.00 plus taxes). Having made the mistake of using expedia.com a couple of years back instead of expedia.ca and getting dinged for $US, I won't make the same mistake again.
I have been looking for fares for a while on the usual sites (AC, Destina, Travelocity etc) and the fares were quite a lot more and this is why I was also initally surprised with Expedia as they dont usually seem to be the cheapest. But I booked the fare, got the confirmation total in $CAD and once I got the AC confirmation code from my itinerary, went to the AC site and confirmed that it was booked. All looks well. With the savings, I should be able to afford a few more pints !!.