I can't answer from personal experience but
www.slickdeals.net has the following:
Quicken has 50% off their personal finance products using code 4855359860. Thanks sgrmag74 and wasurv
http://quicken.intuit.com/?lid=site_banner
* Quicken Deluxe 2008 $30
* Quicken Premier 2008 $45
* Quicken Home & Business 2008 $50
Note, the code is entered in your shopping card in the "Special Offer Code" field. If you do not see the field in your cart, you may need to clear your cookies and try one more time.