Comment by IAmBroom
Quibble: I hate, despise, loathe the dilution of the word "rare" to mean, well, in this case "somewhat interesting and not commonly known".
Photos cannot be rare. Physical copies of a photograph might be. Photos are by their nature singular instances of artistic or technical action, so all of them are equally rare.
> Photos cannot be rare. Physical copies of a photograph might be.
"Photo" means both the image itself and a physical copy of said image. So if you agree that physical copies can be rare, then either you agree that photos can be rare or you are idiosyncratically using a different definition of "photo" than everyone else.