Best way to get to see the March 17th game

I'm going to have a chance to be at the Frankfurt main train station on March 17th and would like to make a side trip to go see the game.  I've been looking online for tickets and there are some German sites where it looks like tickets are about 30 Euro, but I can't understand them to purchase tickets.  There are some English sites where they want to charge me 200 Euro for tickets.  Are they just ripping me off?

What is the best way to get tickets?  Is it usually possible to just show up and buy tickets on the same day and get in?  If so, how much are those tickets usually?

Also, can anyone recommend the best way to get from the Frankfurt main train station to the game and about how much time I should plan to get there?  Is an hour enough or should I plan for two hours or more?

Thanks in advance for any help you can provide.

For the game against Bayern Munich it is almost impossible to get tickets unless you are willing to pay a fortune (either in internet auctions or from scalpers in front of the stadium).

I would suggest you go to a different game.

Ahh, I see, so it's just this particular game.  Thanks for the info.  I guess I'll have to catch a different one sometime.

You should ask Red-Devil, she offers 2 tickets at the topic " foreighn-affairs".Maybe you are lucky and you can fetch them