Bod depends on club and fixture. I became a member of the UK branch of the Borussia Monchengladbach supporters club, £25 for life. Not got any particular affinity. But it’s a good source to guarantee tickets for their home and away fixtures. Hence why we’re seeing them play Bochum next month.
Leverkusen in the past were easy enough to get tickets for, particularly against the less popular teams. Now they’re flying, its become more difficult, had to become a member which is €35.
Bundesliga 2 and 3 are easy enough to get tickets for, in my experience.