Walgreens Photo is offering 25 FREE 4×6 prints when you buy 25 prints. Just use the coupon code EASTER25 during check-out to get in on this deal and make sure to select in-store pick-up to saving on shipping costs. Your final price should come to around $4.75 for 50 prints which works out to be aroudn .09 per photo.
This deal is valid thorugh April 23rd.
(Thanks The Thrifty Mama!)