Factory Authorized Outlet via eBay offers the Generac LP 3,250-watt Liquid Propane Portable Generator for $349.99 with free shipping. That's $50 under last month's mention and the lowest price we could find today by $49. It features a 212cc air-cooled engine, 9.5" wheel kit, and low-oil shutdown.
Note that this accommodates a 20-lb. tank, but the tank is not included.