Newegg has Parallels Desktop 6 for Mac for $30 – $30 Rebate = Free. Shipping is free.
Search for Parallels Mac 6 and get it for FREE with a $30 rebate, you may have to pay tax, but you get FREE shipping.
And the FREE upgrade to 7 offer ended on October 31, 2011… : (
“Parallels Desktop 6 for Mac users who purchased their copy of Parallels Desktop 6 for Mac from an authorized reseller August 1, 2011 – October 31, 2011 were eligible to upgrade to Parallels Desktop 7 for Mac at no additional cost.”
