In a similar way to how taking a picture of the sofa you’re selling from a “pet-free home” with the cat sat on the back of it is a terrible idea, so is this. A lot of people might not like the idea of second-hand sunglasses that their original owner has sweated all over during a long summer.
So it makes sense that this listing would say the glasses have never been worn. A good liar covers his tracks, however, so taking the time to remove the profile pic showing him wearing the glasses would have helped his case. Instead, he gets called out pretty quickly.