the last phone i purchased like this from ebay never showed up and the seller, shipper and my credit card company all refused to take take responsibility nor would they re-imburse me.
the previous phone's speaker didn't work, so i tried to use the manufacturer's warranty to fix it, but they refused since i wasn't the original buyer and the person who sold it to me on amazon refused to refund me because it took the manufacturer weeks to respond. amazon also refused because of the time limit.
the previous phone kept overheating and shutting off randomly and the seller ghosted me and everyone else by shutting down shop so there was no one file a grievance against.
and that's only phones, i've had similar problems with laptops, ear-buds/head-phones, tablets, etc. so i refuse to buy any used personal electronics now.