Most of the deals are because nothing is promised, if you want a warranty buy new or from brick and mortar stores.
Otherwise, do your homework, ask questions, deal with established sellers or folks you feel comfortable with and hope for the best....you can always strike an individual term of warranty with a seller, why do we need anything else?
Otherwise, do your homework, ask questions, deal with established sellers or folks you feel comfortable with and hope for the best....you can always strike an individual term of warranty with a seller, why do we need anything else?

