Just saw this deal at my local Dollar General in the Philadelphia area:
Buy any two gift cards (minimum value $25 each) and instantly get $5 off at register (discount taken at end of transaction). So you can get $50 worth of gift cards for $40, a 20% savings.
Sorry, Dollar General does have YMMV and this is a local deal that is only from 6/10-6/16, so it expires here in Philadelphia tomorrow. Still a good deal for anyone who is near a Bricks and Mortar.