Ebay offers Refurbished Firman 4000W Electric Start Dual Fuel Inverter Generator for $343.99 (reg $429.99) after code with free shipping.

Apply Code: SHOPGIFTSEARLY

Product Description:
The WH03242F is a part of the Whisper Hybrid Dual Fuel Generator Series. It runs at a quiet 58dB, well below National Park standards.
It's the ideal solution for those on the go and those who enjoy camping, tailgating, and other recreational activities. Enjoy clean, renewable, quiet power on the go with the WH03242F.