I date prints I sell. Which is not many - I think my most popular has maybe 10 copies in existence. The time and material investment in producing an edition 'on spec' is not warranted. And I know that I will not want to reproduce a print exactly in a year or so to complete an edition. So my prints are naturally rare. When you add in the limited appeal of most of them ( 8-) ) they are *really* rare!
Photography is not my business, of course. It is therapy!