FIVE YEARS AGO I WAS INTRODUCED TO THE 450 SMART AT ABOUT $23000.EVEN WITH IT'S 45+ MPG I THOUGHT IT TOO PRICY. THEN WHEN THE 451 WAS ANNOUNCED I PUT $99 DOWN THRU PENSKE. WHEN DETAILS OF THE CAR BECAME APPARENT I FOUND IT HAD A DIFFERENT ENGINE,TRANS, AND WAS A LITTLE BIGGER AND GOT ALMOST 10 MPG LESS. SO I GOT A REFUND AND FORGOT ABOUT A SMART. RECENTLY MY INTEREST WAS RENEWED AND I LOOKED INTO WHAT I CONSIDERED THE ULTIMATE CAR TO BE - A DIESEL SMART. APPARENTLY IT'S NEXT TO IMPOSSIBLE TO BRING A USED CANADIAN ONE IN,ALTHOUGH I BET YOU COULD PULL THE ENGINE OUT AND BRING IT IN IN 2 PIECES,WHICH SOUNDS LIKE A HASSLE.I HAVE A FEELING IT WILL BE IN THE US IN A FEW YEARS BUT AT MAYBE $3 K MORE.THEN I STARTED THINKING THAT A GOOD COMPROMISE WOULD BE A LOW MILEAGE 450. AS NEAR AS I CAN TELL THE MPG FALS IN BETWEEN THE 451 AND A DIESEL BUT PARTS, SERVICE, ETC IS BETTER. MY WIFE LIKES THE STYLING OF THE NEW CAR BETTER BUT I THINK SHE WOULD ACCEPT THE 450. CAN ANYONE SHARE THEIR THOUGHTS ON A COMPARISON OF THE TWO CARS AND SHARE THEIR EXPERIENCE WITH THE 450 AND ALSO DEALING WITH THE GREEN CAR COMPANY IN BELLEVUE,WASH.I AM CURRENTLY CONSIDERING A LOADED 2009 FO $10.5 K AND A 2005 450 WITH 1800 miles FOR $11K.