CPO-Outlets via eBay Daily Deal offers the refurbished Generac GP7000 7,000-watt Portable Generator, model no. 5625, for $749 with free shipping. That's $200 under the lowest total price we could find for a new unit. This generator can run up to 11 hours at 50% load, holds up to 8-gallons of gasoline, and features five outlets, low oil shutdown, low tone mufflers, and more.

A 1-year warranty applies, although it's unclear who supports it.