I have a 2009 Smart Passion coupe that I converted to a North American Brabus model, by searching for the least expensive Brabus parts, from eBay, Craigslist, and an east coast dealer's parts department that had the body parts at a really reasonable price. And quite a few parts including wheels from Smart Madness. The car has 35,500 miles on it. It threw a code at 32,000 miles, indicating that it had burned a valve. Had it flat bed towed to the dealer in San Francisco, was going to cost $5,000 for a new head, but the dealer/service department stepped up, called corporate and I only paid $500 out of pocket. I think that was so painless because I only take the car to the dealer for service. To celebrate, I had a new panoramic roof installed. Cost around $950. Then I replaced all four tires, onto my aftermarket wheels (all the same size) and it's like I have a new car. Did it make financial sense to dump the money for new tires and the panoramic roof? I did to me, I love my car, and expect it to give me many more years of service. Also replaced the tailgate myself because some nimrod pressed his bumper and license plate bolts into the plastic. Some would say that I'm upside down in the car, price wise, but I have no intention of selling it. If you want to talk big expenses, try having someone else restore a 1960 Nash Metropolitan for you. I won't quote numbers on that project, but it was a lesson learned, next time I would have bought an MGA. I now understand that the car hobby is an expensive one. My Smart is still my daily driver, but I drive it only about 500 miles a year. Just bought a 2004 Thunderbird, Ford stopped making replacement parts for it a while back, and they only built about 68,000 of them. Parts will become a challenge, but it is fun and comfortable to drive, and I can deal with hunting for parts. I think if you like your Smart, keep it going. If you don't feel like spending the money, sell it and get one of the many new or off lease cars from Toyota, Honda or Mazda. If you're lucky, you'll have a worry-free ride for many, many miles. Our other car is a 2014 Prius IV. The only problem we've had with it is that when dropping someone off or picking them up at the train station, a few folks think we're an Uber or Lyft.