Mac: Need a copy of Parallels 8 but don't want to pay the full price of $89.95 for a new copy? Buying online knocks off a few dollars, but for maximum discount try upgrading from a trial copy of a rival virtualisation package.
A post on OzBargain notes that this loophole has existed for a while, and provides a trial download key for VMWare. Another alternative is to use VirtualBox, which is available free for Mac users. Either way, you can then "upgrade" to Parallels 8 for $49.95.
Parallels 8 For Mac $49.95 [OzBargain]