I am interested, as you can probably guess, in Sun Microsystems equipment. I have one of just about everything they produced from the beginning to the mid-90s. A picture of one of my luggable systems is in a Japanese book on the history of Apple.
The only machine that I have never been able to acquire is a Sun-1.
I also am active in the Retro Computing Society in Providence, the Rhode Island Computer Museum, and the New England Wireless and Steam Museum.