Gift card recommendation?

I want to get a gift card for a family that is enough to cover a single game, but I can't find ticket pricing since it's off season. Based on how it was last year, how much do you think it would cost a family of 5 to attend a regular season game at Camden Yards in the upper deck with good view (or, good enough)? Two adults and 4 kids (ages 1, 4, 6 and 10). Thank you!