There is no excuse in this day and age for “not being able” or “knowing how” to post a photo other than pure laziness.
Simple as that.

Everyone posting on this forum is using a smart phone or tablet or laptop or desktop or combination of these platforms and thus has access to myriads of sources to assist with the photo-posting education.

Rarely do I engage a seller who doesn’t post at least one photo. A photo is proof of life that the item for sale actually exists, if nothing else.