How about screen burn? it doesnt say whether or not they deem that as a “still works fine” issue
Per the vendor:
These devices will not have any screen burn ins. A screen burn in would mean a screen replacement.
I bought one. but there’s a HUGE crack on the back side. I tested the camera and flash and they both work. but the SIM card slot does not. 
it does not work as a phone. gonna have to return it
I ended up returning it. it was quite easy. Woot understood and accepted it back. they sent an RMA and shipping label. it did take about a week for them to receive and refund me back my money.
Of course Prime day came and there was another batch so I bought it again, different color. waiting for that one to arrive.
I received my new/2nd Google Pixel 2. and it works perfectly. there were 3 minor minor scratches on the screen but you can’t see them unless you have the light shine on it perfectly. I guess i’m back to being a satisfied customer.