I need to buy a laptop battery because my current battery can only work when being charged. If never charge, the battery will be 0% and shut down straight away.
can giv the OEM manufacturer a call and ask for the price of a new piece then compare with the one on auction.
if no one bid for it usually the price may be too high or the demand low.
if you got the price check from the manufacturer you may want to use it to compare with the piece on bid and decide if you should get the used unit or a new one with some warranty from the distributer.
rechargeable batteries are very subjective unlike cards or ram. there is no telling how many charging and recharging cycles the used battery has gone through and reliability on how well the unit was kept or used in the hands of the previous owner