Factory Authorized Outlet via eBay offers the Duromax 8,000-watt Dual-Fuel Portable Generator, model no. XP10000EH, for $699.99 with free shipping. That's tied with our mention from January and the lowest total price we could find now by $300. This generator runs on propane or gasoline and provides a constant 8,000 watts of power with a 10,000-watt max output.