Ending today, 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 last week's mention 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.) It expires September 26.