Well in 2023 it was between 12,60€ and 14,80€ in 2023 for a Maß (1l) so it might just crack the 15€ mark this year. But the Oktoberfest in Munich is legendarily expensive. Like, that’s basically double what you pay in a regular Biergarten in Bavaria, outside of the cities. And there are more than enough willing to pay that price.