95 530i
The 1995 530i has a V8 - same engine as the 540 with shorter stroke. This engine has the infamous nikasil issue (as does the 540), where a certain number of them developed pitting on the cylinder walls caused by sulpher in gasoline. The effect is rough idle. BMW offered replacement engines made with Alusil. If the car spent it's life in a state with low sulpher gas, like Ca, it probably won't have a problem. But, if you can get a car with an Alusil engine, it is better for peace of mind.
I have a 1995 530i 5-sp (with a nikasil engine) and I love the car. Good balance, nice looking, not too expensive.