The best concert I ever saw was Neil Young at San Jose Center For The Performing Arts in the late 70s. Tickets were $12, which the Dept. of Labor tells me is $47 in today's money.
I'm not sure why I enjoyed the show so much because the guy was stoned out of his mind and has never had the best of voices, but he had such a rapport with the audience that it drew everyone in. I remember my hands were actually sore from clapping so hard. I wasn't high myself, either.