Factory Authorized Outlet via eBay offers the DuroMax 8,000-watt Portable Gas Electric Start Generator for $499.99 with free shipping. That's $150 under last September's mention and the lowest price we've seen. (It's the best deal today by $190.) It features 8,000 watts continuous (10,000 watts peak) output, a 16-horsepower 420cc engine, electric start, 10 hours of runtime at 50% load, 8.3-gallon fuel tank, and five outlets.