What’s your favorite promotional/rare item?

The 29th day of #30DaysofDarkSun is here and the question is "What’s your favorite promotional/rare item?"

There are quite a few promotional/rare items, you can check them out on the Dark Sun Collectors Guide on ENWorld. Several of the promotional items I have never seen in person, particularly the Dark Sun cap, pin, buckle, or key ring. My top three favorite promo items are the Dark Sun miniature boxed set (a small boxed set about 4x2x3 inches), the 4e Cloth Map (a limited edition velvet type cloth map released at GenCon2010 promo), and the Dark Sun Brom Art Prints.

Of the above three the Dark Sun Brom Art prints are my favorite. They're pretty rare and include one item that was never actually put in a Dark Sun product. The prints are beautiful and would look great framed on a wall. I had a set at one point but needed some money so I sold them. :-(.