2.0 GTA with lots of KM

As already written above I think about buying a Mazda 2.0 BK. The cars are now really cheap with approx. 4000€, but have already 170-200.000km on it. Now my question have the 2.0 chain problems? How long do the chains keep from the engines? Are there any other known engine problems? Gearbox? Unfortunately you find very little to the engines the 1.6s should have been far more popular.