I was at Whitecaps v LAFC last week, the cheapest tickets were $42.50 behind the goal (£25), in the corners was $50 (£30), but the middle sections on both sides were $80-$100 (£47-£60).
MLS attendances in Vancouver are pretty poor, so the tickets aren't that bad but they make up for it with...
A beer will set you back anywhere between £10.75 - £13 at a Whitecaps game.
If you're at Rodgers Arena across the road a beer will cost you even more!!