Right now, you can get 100 prints from Snapfish for around $6 shipped. Just upload your prints to Snapfish, choose to order 100 4×6 prints, and use coupon code PRINTSFREE at checkout. Your total should be around $6, including shipping.
This offer is supposed to be good through November 30, 2011.
Thanks, My Frugal Adventures!
(Note: The links in this post are my referral links. Read my disclosure policy here.)