EAST RUTHERFORD New York Giants ticket prices are going up by $5 for the 2006 season, the team announced earlier this month. The new prices will be $75 for open and lower tier seats and $85 for mezzanine tickets. The team said its average ticket price last year $73.57 was 11th highest of the 32 NFL teams. The team opens the season on Sept. 10, hosting the Indianapolis Colts at Giants Stadium. The schedule for the rest of the games is expected to be announced in the next few weeks.