I have a 125 Aqueon purchased used in 2017. Solid tank. Also 2 75g of unknown age (= old), and 2 40b also of unknown age. All came to me as used tanks several years ago. Not a single issue. I also just resuscitated a very old Perfecto 125, which may be 30 years old, simply because they have not been manufactured in a long time.
My belief is that if the tank is on a proper stand (well supported, even, not exerting uneven lateral pressures (twist) on the tank), they are fine. Resealing the inside of a tank (mainly not structural) if there are issues is not difficult if the actual silicone between-panels (structural) appears in good shape. And then, there are the considerations as to where in the house the tank will be located (living room or like place vs basement, garage, etc). Good luck!