DuroStar 10000 Watt Hybrid Dual Fuel Portable Gas Propane Generator – RV Standby $499

Seems to go on sale 2 or 3 times a year. Last time it was on SlickDeals (January) it was $585, and before that in December it was $650, so this seems like a great deal compared to that:
https://www.ebay.com/itm/DuroStar…1438.l2649