I bought the Insanity Max: 30 on eBay. When I try playing some of the discs, there are some that just completely freeze. There are two discs with Abs workout on them, when I select it on the menu it loops through the introduction and back to the menu again. I confronted the seller and they told me they used a 3rd party seller. They asked me to send it back to them for a refund but then they will just sell it again.