You might recall that the San Francisco Giants have begun using a system that allows them to alter the prices of their tickets to help increase ticket sales (see here and here), much the way that airlines price their tickets. They use a system that allows them to alter the price of their tickets to account for changes in weather, etc.
Christian Hassold has a nice defense of such a system.
Dynamic ticket pricing is needed now and it could benefit the market in
two ways. First, it would reduce the number of tickets resold on the
secondary market because dynamic pricing would reduce profit potential
at resale. Second, dynamic pricing could increase ticket sales volume
for events where interest was low. It seems plausible that some
concerts are under attended because lower quality ticket prices (with
fee’s) are not enticing enough. This is probably why Live Nation is
putting so much effort into selling lawn seats for $25 with no
ticketing fees – that kind of price entices people to buy.