Care buying a used Power Conditioner is urged. The MOVs, Metal Oxide Varistors, used to shunt power to ground can do so only so many times than are 'worn out'. I would tend to avoid a used conditioner, except perhaps, in the case where NO surge protection is provided.
Other surge protection schemes, like a whole house unit, may have a better lifespan.
Other surge protection schemes, like a whole house unit, may have a better lifespan.