Try that website. <a href="http://www.BN.com" target="_blank">www.BN.com</a> also has cheaper prices sometimes. <a href="http://www.Bamm.com" target="_blank">www.Bamm.com</a> too.
I wasn't aware there was a "digital version" of the Audio Osmosis CDs - I think this guy's trying to make a quick buck (illegally) selling his imported MP3s a whole bunch of times online.
If anyone is interested in purchasing study materials, feel free to look in the SDN Classifieds further down the forum. I'm going to go ahead and close this thread since it's, uh, slightly outdated.