See http://www.bahnland-…

It’s been a few years, so I won’t name a price, but it was a very inexpensive way to go. I bought them at a kiosk in the train station on the day we were to use them. I seem to recall that they cost more in the ticket line; I found the kiosks in a separate room and had difficulty using them because I didn’t know the local geography, but they had many attendants there to help us.

I was with my wife, so that was our group. I didn’t look into what the requirements for a group were, whether you had to be related, or members of a club, etc.

I would buy the Bayern ticket in advance from bahn.de, but if that doesn’t work out for you, just buy it at a German rail station as Cleveland describes. Deutschbahn has an office in London where you might be able to buy it — I don’t know if there are offices in other major cities outside Germany.

The link I posted must have been sold.

Here is a current link. http://www.bahn.com/…

Note they have a single ticket and the multiparty ticket. Each costs 2 euro less if bought online or at the machines. I can’t recall if they are dated. Because I like flexibility, and they can’t be used before 0900 (on weekdays), I just bought them the mornings we needed them. Note that you can use one for a nice daytrip to Salzburg.