Day 21 - First time you sold some of your D&D books -- for whatever reason.
I never sold any of my D&D books. I have all my copies not destroyed in shipping. I am bibliophile and bibliomane. I have nineteen bookcases in my apartment, most filled with books. Magazines fill one bookcase. The only reason I do not have more bookcases is adding more would make it difficult to get through the apartment.