Groupon again offers a $70 VistaPrint Credit for $17. Plus, receive 30% off regular-priced items via this offer. (The discounted items can be found here.) That's $53 off and tied with our mention from two weeks ago as the best such deal we've seen for VistaPrint, which specializes in photo books, cards, calendars, and more. The voucher excludes shipping costs and sales tax. (Orders of $95 or more qualify for free shipping.) The credit is valid until November 21. Deal ends August 20.