Factory Authorized Outlet via eBay offers the Duromax Dual-Fuel Portable Generator, model no. XP4850EH, for $299.99 with free shipping. That's $200 below our mention from last fall, which included a $100 credit, and the lowest total price we've seen. (It's a current low by $300.) This generator is able to run on propane or gasoline and provides a constant 3,850 watts of power.