As a reader discovered, Factory Authorized Outlet via eBay offers the Generac LP 3,250-watt Liquid Propane Portable Generator for an in-cart price of $299.99 with free shipping. That's $50 under last month's mention and the lowest price we've seen. (It's the best deal today by $100.) It features a 212cc air-cooled engine, 9.5" wheel kit, and low-oil shutdown.
Note: This generator accommodates a 20-lb. tank, but the tank is not included.