Regarding Stubhub, here's information that might be helpful. The site shuts off the ability to purchase tickets 2 hours prior to the scheduled game. If there's still a significant quantity of tickets available on stubhub as the shutoff point approaches, prices will plummet and you can snag a good deal. Note that you'll probably have to print your own tickets (for a $5.20 charge) and have to pay a 10 percent service charge.
There's currently over 1000 tickets for each TB/NY game on there now. That's a good amount but nothing like the upcoming Cub/RedSox series at Fenway where each game has 3 to 4 thousand seats for sale.