And this is why i always video myself opening it. I had this happened to me once at Microcenter. I bought a low end video card to add in an older dell inspiron which only had 1 video output. I got it, took it to my office, opened it, and BAM! No video card. It was only like 30 or 40 bucks but still. I went back and I wasn't sure if they would do anything about it. Luckily they refunded me. Now, anything that is not fully sealed, i check it before i buy it.
I do the same with any expensive item and anything electronics related. It gets delivered which my camera picks up, then I fire up my phone camera so I have video of delivery, me going outside and bringing it in all uninterrupted and then I open it check it and if at all possible test it.
I do the same anytime I sell something on eBay. Twice someone has tried to screw me over but what pisses me off is eBay will still give them their money back they just won't take it from me.
I sold a Sapphire Trix 290x once, I filmed it in the PC playing a game. Shutting everything down, removing power from the system, removing the card and putting it in an ESD bag then taping it closed then packing it up and driving to FedEx then dropping it off.
Guy started acting odd with messages the second he got got tracking info. It arrives at his house and is signed for. 2 days later he sends a msg saying he didn't get it. I reminded him I entered tracking info into ebay.
Next day he sends another message about how it doesn't work and then mentions that he took it apart... I replied that it definitely works but had something happened during shipping it was fully insured and that he had no permission to take it apart if there was an issue.
He reports it to eBay and I send them a YouTube link and ask that they read the messages. Case closed on my end.
Couple months later and nearly identical a guy says a mint condition (original everything, not a scratch on it) gameboy has a broken screen that's all scratched and the light doesn't come on. Impossible since I put it inside a cloth bag that couldn't scratch anything, I also filmed that. Sent it to eBay. Case closed.
That was the last thing I ever sold. I didn't want to deal with the hassle. Both left negative feedback, both were removed.
Always protect yourself as much as possible. Hell I bought 2 pixel 7 pros at best buy last week and I asked the guy at the register to open the boxes for me because once I bought a sealed new phone only to find an old phone inside.