Even a 2010 model car bought 2nd hand can turn out to be a headache if the owner had abused it, or it had been accident /repaired. My current car is 91 Nissan, which is a perfect one in terms of luxury, power, economy and value for money.
So the point is to check the car thoroughly before striking a deal, whether 3 years old or 20+ years old.
Regarding parts, I do believe Nissan's parts are more easily available and much cheaper than likes of Daewoo, Huydai, Joy etc.