Max Tool Sales via eBay offers the DuroStar Gas Powered 4,000-watt Portable Generator, model no. DS4000S, for $225 with free shipping. That's $5 under our September mention and the lowest total price we could find by $98. It produces a 4,000-watt surge, has 3,300-watt running power, and runs for up to eight hours at 50% load with a 4-gallon fuel tank.