Factory Authorized Outlet via eBay offers the DuroMax 3,500-watt Hybrid Dual Fuel Propane/Gas Portable Generator, model no. XP4400EH, for $349.99 with free shipping. That's $99 under our mention from last October and the lowest total price we could find by by $150. It features a 4-gallon fuel tank, power panel with engine shut-off switch, volt meter, and eight hours of run time at 50% load capacity. Deal ends May 26.