Costco Sale: A-iPower Yamaha Powered Inverter Generator $399.99

*UPDATE* 8/23/19. Great for camping and tailgating. Select Costco locations have the A-iPower Yamaha Powered Inverter Generator on sale for $399.99 (after instant savings), now through September 1, 2019. That is $50 off Costco’s new regular price of $449.99. While supplies last. Item #1146127. Price, participation, and sales dates may vary by location. This product was spotted at the Covington, Washington Costco but may not be available at all…