you don't know. you just have to go with it, or buy new. but I mean look at the reviews, ratings buy buyers, and how many. also look for believable prices, and I mean if you get a wrong item, theres always the ebay policy. they will refund if you don't get what you ordered. its that chance you have to risk taking. even if the reviews are good, the seller might take a dip and do something. still protected by eBays poilcy