So, how much do you want for your Aviator?

Once-proud SUV owners are gaining green street cred cashing-in on President Obama’s $1 billion “Car Allowance Rebate” program giving car and truck buyers a $3,500 or $4,500 credit to swap their aging gas-guzzlers for new, more fuel efficient models.

While not an alternative to highway approved cars, it won’t be surprising if those who value image most in switching to a more green way of getting around pass up Global Electric Motorcar’s GEM e4 or Ducati Enegria’s “Free Duck” quadricycle. Neighborhood Electric Vehicles have been the vehicles of choice for leaders at the G8 meeting in L’Aquila, Italy, who seem happy to sacrifice chic in the name of the planet and photo opportunities. Form aside, GEM cars get the equivalent of 150 miles per gallon, or two cents per mile, according to the company. And that’s a lot farther than the boat of a truck you bought before the tech bubble burst.

Are you willing to trade in your clunker, and for what? If you already have, how easy was it to get your credit?