I bought a 2000 Boxster 2.7 manual with 47k miles in late 2014 for $10,000. Two years and 19k miles later I’ve spent $3,900, or $1,800 on average per year. That has included: spark plug seals, oil separator, minor electrical repairs, new key/remote, A/C compressor drive belt, wiper cowl panel, battery, two annual…