Then get ready to pony up. This article will give you some prices at various ballparks around the country. But the bigger question is what kind of beer are you getting for that price? I remember attending a Phillies game in midsummer at the old Veterans Stadium years ago on a 100 degree (in the shade) day. The cost for a cold Coors Lite back then was $4.50. A cold bottle of Poland Spring was $4.00.
That speaks volumes to me.