It may be slightly more expensive but you're best bet for good seats would be to either go to stubhub.com or ticketmaster.com or to go to the stadium on gameday and buy tickets there. Lots of people will be selling their tickets.
However, getting them outside the stadium is risky since there's a good chance that they will be counterfeit.
In the past, I have bought them from StubHub and had no problems. Cost more but you can find good seats.