For a limited time Max Tool Sales (via eBay) is selling the DuroStar DS4000S Gas Powered 4000 Watt Portable Generator for only $229.99 + Free Shipping. This is $270 off the list price of $500, and cheaper than Amazon by $100. The generator has earned a high 4.3/5 stars from over 270 reviewers on Amazon.

If you're looking for a portable gas generator for camping or just home backup, this is a great option. It's 4-gallon tank provides a continuous 8 hours of run time.