I wouldn’t buy a new Seagate drive, let alone a refurbished one. Every Seagate I’ve ever owned died in less than five years. Every WD I’ve owned lasted until long after their capacity was so far outpaced by newer drives as to be useless.
Anecdotal, yes, but it’s happened enough to me that I’ve been soured on them for life.
Except you missed a bug in the “check if it’s sorted” code and it ends up destroying every universe.