Groupon offers a $70 Vistaprint Credit for $17. That's $53 off and tied with our mention from two weeks ago as one of the best such deals we've seen for Vistaprint, although we saw the same credit offer plus 30% off regular-priced items in December. The voucher excludes shipping costs and sales tax and expires October 15. Deal ends August 17 at 12:59 am ET.