eBay with EcoFlow has the refurbished, very good condition EcoFlow RIVER 2 Pro 768Wh Power Station on sale for $261 - 20% off with coupon code LONGWKND20 [Exp 2/16] = $209 with free shipping. Roughly 27 cents per Wh. 

• Seller notes "“Works like new. Restored to factory settings.May have larger scratches or dents .May be missing parts, accessories, or packaging.”