> they're not really meant to survive multiple large surges. They shunt the power destructively, just somewhere you don't care. Is this a concern when buying u

> they're not really meant to survive multiple large surges. They shunt the power destructively, just somewhere you don't care. Is this a concern when buying used rackmount power conditioners (like used for live music setups?), to protect home IT gear? Can they be worn out without a sign that they are?