So I'm buying a series 6 from eBay but I'm hesitant with the seller as he only has 4 reviews and 1 of them is negative. He sent me the actual picture of the sealed box with the serial number but when I checked the serial in Apple's warranty check website it says it was activated last May 3, 2021 and has parts warranty until May 2022. The warranty period makes sense but how is it activated already if the watch is unopened? Is this possible? I want to give the seller the benefit of the doubt but he also can't explain why the Apple website says it is already activated.