I don't think it would devalue the item.
And I think the seller should have a photo of the item and not just its box, especially since this person is an experienced seller on eBay
In past years, I would have ignored this and trusted the Seller's Feedback score and years on eBay.
Not anymore based on recent experience.
Now I want to see a real photo of exactly what they are selling.
Not a box, not a marketing photo, not any representation of the real deal.
__________________
WTB: Slingshot bicycle promotional documents (catalog, pamphlets, etc).
WTB: American Cycling May - Aug, Oct, Dec 1966.
WTB: Bicycle Guide issues 1984 (any); Jun 1987; Jul, Nov/Dec 1992; Apr 1994; 1996 -1998 (any)
WTB: Bike World issue Jun 1974.