Good luck.
Two tickets to all seven home games this year are around $2,500.
Even the non Big Ten games are getting ridiculous! I would stay away from Ebay or craigslist as well, as people are just now finding out if the won tickets through the lottery. People are selling things that they don't even have. Best bet is to look at the visiting teams athletic boosters. That is how I got most of my tickets last year. There are some restrictions though.
Good Luck, and Happy Hunting.