I pay just under $100/mo to insure a 1 of 724 (in the US) Boxster Spyder for 7,000 miles a year. For comparison, my 10-year old Mazda Miata ran me $62/mo with

I pay just under $100/mo to insure a 1 of 724 (in the US) Boxster Spyder for 7,000 miles a year. For comparison, my 10-year old Mazda Miata ran me $62/mo with identical coverage, and was worth about 10% as much. However, unlike the Miata, I have declared value insurance because the car is worth 15% more than when it was new. Miata had typical depreciation insurance. Tires more expensive? Yes, because they're bigger. ~$1500/set versus $1000/set (shipped, mounted and balanced) for the Miata, and the rears wear out about twice as fast. Maintenance? If I went to a dealer for service, labor rate is 24% higher compared to a local Mazda dealer. I instead go to one of the best Porsche independents in the US and he's about 12% more than a local Mazda dealership, and he has way cooler stuff in his garage (last time I went, three 959s, a one-of-17 TechArt CTR3, and other craziness). Though still lots I can do myself. Parts? I did a full brake job recently, and it cost ~10% more than something like a Subaru WRX STi. I actually used uprated brake fluid (which was +$20 over OEM), though everything else was OEM. The only major long-term expense is engine rebuilds. Figure 25-30% more than rebuilding a mainstream V8 like a Toyota 1UR/3UR, Ford Coyote or Chevy small block. Though that's usually every 15-25 years (depending on engine hours at high RPM), so that's something you just sock money away for well in advance.