I don't think you should be skeptical of the claim if all else checks out. I'm not proud of it, in fact the opposite, but I do have some great watches, or at least I think they're great watches, I acquired many months ago that have yet to be unboxed. Even the ones I've worn, many are worn either so few times, like once or twice, and/or strictly while sitting on the couch at home (I've actually had a few automatic watches stopped on me because I don't hand-wind them past the initial get-going and I don't move much at home, and it's partly why I love the PR on my Snowflake 😅) that they are basically new. Again, far from proud and I often question my psychological well-being, but I have no doubt watches under similar ownerships do come up for sale. Though doing your homework is key, and I would capture a mental note of buyers who have a habitual tendency to overpromising the condition. Worse I've seen was someone who described a GS as once-worn, but upon inspection of the pictures there are scratches on literally every surface. Funnily, after I pointed it out and advised him to update the description, the seller swapped the pictures for ones really far away.