CPO Outlets via eBay offers the Generac iX800 800-watt Portable Inverter Generator, model no. 5791, for $287.10 with free shipping. That's the lowest total price we could find by $13. This generator can run for 3.6 hours at 50% load and features a built-in handle, fully-enclosed case, circuit breaker protected outlets, LED status lights, low-oil shutdown, and 12-volt battery charging option.