Apple

Cant the seller connect it up himself and check..

I bought a bunch used and never had an issues.

Probably stolen.

Never ever had an issue with my 3 Apple TVs.

I prefer to buy directly from Apple Refurbished store. I've bought two in the past, never had any issues, practically brand new

I buy them from Best Buy because I’m a total tech member and I get free AppleCare with the purchase. It’s not relevant to your question but thought I’d throw that in here.

I rarely see AppleTV fail. I see no reason not to buy one unless you want a new warranty or the remote they offer you is the older one or super beat up.

AppleTV does not have any activation lock on them. If the one you buy is associated with someone else’s Apple ID, it can be factory reset without needing to sign out.

Make sure you aren’t buying the really old Apple HD instead of the 4k.

What to do before you sell or give away your Apple TV 4K or Apple TV HD

Also, verify what AppleTV Model it is. The market is full of Older AppleTV HD… and the listings I see cqll them 4K

Here is a list of Model Numbers for your reference.

https://preview.redd.it/zcpb3okrxb3c1.jpeg?width=1284&format=pjpg&auto=webp&s=db1699fbff8701c8016de1347bc20a52b25db844

You can find great information on every Apple Product at the link below:

https://everymac.com/

eBay and PayPal Protection MAY cover your purchase, but, if the Seller has already disclosed that he doesn’t know whether it has been reset, and made you aware of it, Purchase Protection may not cover you.

BYW: I am not an eBay or PayPal user.

Just factory reset it, and choose the option that downloads a fresh copy of the software.