A perfectly valid reason to buy a Smart is because you think it’s cute.
Another perfectly valid reason for buying one is because you want to make a statement about your personal values and taste. That’s fine too.
I think a lot of Smart cars get sold for exactly those reasons. And of course, those are the same reasons people buy Mustangs instead of Tauruses. A Smart also makes sense if you are really space-deprived. Either in congested areas, or if you have a small parking space or a small garage, a Smart might make sense.
However, if you’re evaluating the car purely on a ‘save the earth’ basis, and trying to find the one with the lowest footprint, the Smart car isn’t it. A number of hybrid vehicles on the road will beat it.
If you try to justify it purely on economic terms (lowest combination of purchase and operating cost), I don’t think it wins there, either. Cars like the Fit and the Yaris offer much more utility for less money with reasonably close gas mileage.
If you’re evaluating it purely in terms of value (most car for the least money), I don’t think that works either. The Smart Car is a Mercedes product, and Mercedes tends to option ever bloody thing on the car to get the base price low. You need to compare the Smart’s price once you bring it up to spec with the competition, like the Yaris. For example, you don’t even get a tachometer or a clock in the Smart unless you cough up $160 for them. You don’t even get a radio unless you cough up another $340. I just priced out out with a few options (radio, tach, cargo net, air conditioning and floor mats), and it came out to $17,985. And Mercedes charges more for freight and documentation and such than most other car companies. So really, the car is right around $19,000 - $20,000 unless you want a complete stripper.
I priced out a Yaris with the same options (AC, mats, cargo net, stereo with CD), and it came in around $14,500. With freight, just over $15,000. (this is all Canadian, BTW). So I’m paying a four thousand dollar premium for 15% better fuel economy? You’ll have to drive a lot of miles. A Yaris burns 7L/100km, a Smart burns 5.9. I’m going to save 1.1L of gas for each 100km of city driiving I do. Gas is about $1.20/L right now. So every 100km, this car is going to cost me about $1.32 more than driving the Smart. If you drive 30,000 km per year, your fuel savings will be about $396 if you own the Smart. Most people don’t drive that much. You’ll have to drive the car for 15 years before you save back the extra money you paid for the car.
In any event, what you really want is an Ecomobile. I want the one with the bigger engine. I’m sure it’s a death trap on two wheels, but damn it looks like fun.