My friends HIGHLY recommend the Walgreens brand of diapers- Well Beginnings. They are often compared to Pampers.
This week they are $6 a pack when you buy 2 (through 2/21):
There is even a coupon available for $1.50 off one box of Well Beginnings Diapers.
Print two and head to Walgreens for a great deal:
Buy 2 Well Beginnings Jumbo Pack Diapers, 23-50 ct $6.00 each, when you buy 2
Use 1 $1.50 off one box of Well Beginnings Diapers (there is a limit of one per transaction)
Final Price: $5.25 each, when you buy 2