Powerland via eBay offers the Powerland 8,000-watt Tri-Fuel 16-Horsepower Generator, model no. PD3G10000E, for $799.99 with free shipping. That's tied with last week's mention and the lowest total price we could find now by $599. This portable generator runs on gas, propane, or natural gas and features a steel frame, low oil shut-off, and 10-hour runtime.