I have a few classes at USC which the notes and study guides are posted on this website grade buddy. Basically for professors that have been at the university for a while; mainly greeks take the notes (they have notes plus tests from previous semesters) and they get paid to do this. Anyway for every invite / referral I get 3 bucks to spend on the site. You also get 100 credits valued at $3.00 on the site.
Its really easy, just follow my link, then create an account with your email and then verify the email.
I will give +K to everyone. In addition I have a bunch of stickers to give away as well as my oakley crowbars from 2011 with the fire iridium lenses to one lucky person if I reach $60.00 worth aka 20 people. Thanks -- Walshie