Powerland via eBay offers its Powerland 8,000-watt Portable Dual-Fuel Gas/Propane Generator, model no. PD2G10000E, for $799.99 with free shipping. That's $700 off list and the best deal we could find. This generator can run on gasoline or propane; it features a 16HP air-cooled engine, 8,000-watt output, 10,000-watt max surge output, 8.3-gallon fuel tank, and low oil shut-off.