Sure, if you want to look at it from a purely economic view. But with game attendance taking it's second worst dip since they started keeping statistics on it, administrations around the country have to start looking at making attendance more attractive. That would include keeping ticket costs down. I heard on the the Zone radio last night that Direct TV paid the NFL $1.5B for exclusive rights to broadcast NFL games. So, you have to be a Direct TV subscriber AND pay $350 for their NFL package. Any wonder viewership is down?
I think it's unreasonable to adjust the price of a spring game ticket to try to keep up with what the market dictates because that's such a dynamic number as demand for tickets can widely fluctuate. Depending on the 2018 season goes, next year's spring game may not be a sellout. It was hot ticket this year, I don't think it will be next year.
Besides, it's been said it's only about 1% of the tickets that aren't being used by the original purchaser.