Kijijji can also be a good place as well to get tickets last minute, but you're dealing with the seller directly and there is no guarantee/fan protection like StubHub offers. If you do buy off someone from Kijijji, make sure they are hard copy tickets, not electronic.
Scalpers in front of the Rogers Centre are pricks, and won't budge in lowering their price before the game, unless you go 2-3 innings after and they are desperate to unload them.
Another option is check the Blue Jays site in the morning, as new tickets are always rereleased from employees, players, etc.
Again, you should be fine seeing the game on the 13th and you won't have to pay more than face value.