GROUPON: Goods Sidewalk Sale – Up to 80% Off (July 27-28) July 28, 2016 Groupon.com is having a Goods Sidewalk Sale. Save up to 80% off select product deals. The 2-day sale is available from July 27-28, 2016. Prices as marked. Valid on select goods. Click here to shop Groupon.com now or for more details about the sale.