Costco! PowerStroke 3,100 PSI GAS Pressure Washer with Electric Start! $299!!!

Costco has the PowerStroke 3,100 PSI GAS Pressure Washer with electric starter for $299!!! Is this a good value?  I am looking for a new pressure washer and seen similar specs on line for hundreds more: 

I just need to wash my porch and deck. But dont know if I should invest in a GAS or ELECTRIC pressure washer.  Let me know what you think in the comments below if this is a good value or not?  Thanks!

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