No, not unless the family knows the entire history of that seat. Government and safety agencies urge that seats be discarded after any car accident, because hairline cracks in the plastic can render the seat unsafe for withstanding any future crash. But many families continue using these seats, and can pass them on unknowingly to other families. Generally, only a new seat is sure to be safe - please see NHSTA guidelines on determining a seat's safety following a minor crash. (Furthermore, even if you know the history of a seat, it is unlikely to be a Britax Regent or SunShine Kids Radian80, which are the only models harnessing to 80lbs for older children.)
