Ending today, Living Social again offers a $50 VistaPrint Credit for $10. That's tied with our mention from four days ago as among the best discounts we've seen for this photo services merchant. (We also saw a $70 credit with a 30% off discount on regular-priced items for $17 eight days ago.) Shipping is not included and starts at around $4. VistaPrint specializes in photo books, cards, and calendars. This credit must be used in its entirety in one purchase by June 3.