Northern Tool + Equipment offers the Amico 5,500-watt Portable Gas-Powered Generator, model no. AG6500E, for $300. Opt for free in-store pickup to dodge the $103.54 shipping fee. That's the lowest total price we've seen for any 5,500-watt generator. (It's also a current price low for such a generator by $249.) This 181-lb. generator features a 6.4-gallon fuel tank, 5,500 watts continuous (6,000 watts surge) power, up to 12 hours of run time at 50% output, and more.

Update: Of note, a battery is required for electric start (not included).

Update #2: As a reader discovered, coupon code "161064" cuts it to $250.