Buying advice Previa

Hello, would like to get an older Previa. I am totally dissatisfied with my Espace. And since you hear so much good about the old boxes, I thought it might be the better choice!? Who can support me with this. So, the new model is not financially in it or I don’t want to invert so much into the car anymore. Have I pre-stemmed a model in the nineties. Did the things timing belts or chain? How reliable do you judge the cars? What should you look for? What about rust? Of course, the Renaults are not to be beaten with their plastic car. kermi