AT&T Prepaid Refill Card 20% Off ; Apple iTunes Card 15% Off @ Dollar General (Nov. 21st Last Day of Sale)

http://www2.dollargeneral.com/Sav…index.aspx
Ad at bottom right corner.
Sale began Nov 18th, but I only saw it today. Tomorrow (Nov. 21st) is the last day. You’ll pay sales tax unlike with Callingmart, but Callingmart only has 5% off now. BTW, Callingmart’s 5% Thanksgiving discount code is THX185 (good until Dec. 6th).
A 20% discount seems too good to be true, but Dollar General is a pretty big chain. The only ones around me are in shady areas, so I might just pay the extra $10 for the $100 card.