Link: http://accessories.us.dell.com/sna/sna.aspx?c=us&cs=19&l=en&s=d
If paying with Dell Preferred Account (DPA) you may save an extra 3%, here
is how:During checkout, select Credit Card as method of payment
Click "Change Payment Type"
Click "Choose" link under Credit/Debit Card (again)
Under "Save 3% with Dell Preferred Account! (Discount applied at Final
Checkout" click "Click Here to Take Advantage of this offer" link
Click "Choose" under "I already have a Dell Preferred Account" if you have
one, or sign up for a new one if you don't
Checkout, enjoy your 3% savings
5% with Shop Discover.
Link: http://www.discovercard.com/customer-service/rewards/browse-all
Enjoy!! and best of luck.