I agree that photos can tell and hide a lot. If a seller has limited photos I wonder what he is not showing me. Sometimes I buy a gun inspite of bad photos but often I just pass.
If the seller has many items for sale I will look at several others to see if this is his normal level of pictures or may be slanted to hide flaws.
I myself have been guilty of not always using good light or showing features I should. Being a very rank amature photo taker I often miss the mark. That's one of the reasons I so rarely post pictures.