I own a M-Audio Oxygen 8 older version that i had for almost a year that I got used. It doesn't perform that well and it drivers are subpar. I should had asked here before I got it used. What is the best one under $100 dollars, I don't want a 61-89 key one as I had a full size keyboard once that I hardly used, do to casio not having 64bit drivers and the size. 60-70 key one will be fine, If it has windows 8 drivers then that's a plus but windows 7 64bit drivers is fine.
I don't think you can get a decent 60-70 key controller for under $100. The Oxygen 49 (49 keys) is a budget controller, but still costs around $150. It's a nice controller though, I recommend it.