12 prints, ready to be framed for one low price... pass ... says Mike S.
How many people are going to shell out the cost of framing 12 CALENDAR prints?
Create a calendars-ONLY gallery, if diluting of sales is a worry. Design the pages YOURSELF with writing on them, frames, maybe big screaming watermarks that say "I OWN THIS."
Let's not create one of the most practical printed items today, because people might not buy our more expensive, bigger FINE ART prints.
I dig calendars. I just sold a couple at a couple of other sites. No huge profits. People wanted CALENDARS, not prints. That's all they could muster for the purchase of anything remotely artistic. I seem to be okay with this. Obviously not in it for the money yet. Maybe a calendar would inspire the purchase of a particularly attractive print in the buyer's eye later on, after hanging on the wall for a month.