It really depends on the condition of the chair and the relevance of the technology built into it. If the chair in question was taken care of during its first reign of ownership, regularly cleaned and not exposed to intense sunlight then there is no reason why a used chair couldn’t make a great addition to your home. It must be noted, however, that everything has an expiry date and certain software installed into older massage chairs might not be repairable anymore, should any issues arise in terms of performance. This is a risk you’ll take.