ask for timing belt replacement at the appropriate age?

Depending on the model, the vehicle manufacturers recommend changing the timing belt between 80,000 and 140,000 kilometers driven (sometimes more) or at a vehicle age of 10 or more years. It is very important, because a rip can cause a capital engine damage. Now I have seen very detailed technical details in sales platforms, but whether and when the timing belt was exchanged or not is not exchanged, does not appear anywhere. I suspect that a conscientious Priva tauto salesman acts caringly, if he has the timing belt exchanged shortly before the sale at due time. I agree that the intended timing belt exchange also indicates a fair seller before sale or is the buyer simply to blame if he does not pay attention to this important detail and possibly gets an engine damage. Gruss Dieter