What's the rarest or most unusual computer-related item do you own?

I just joined this list, so I'm not sure which of the items I own would be considered by this group to be rare or unusual, but here goes... Imlac PDS-1D graphics terminal, with the large screen and detached keyboard. Also a second one with the small screen and attached keyboard, but the chassis and cards are suitable only for parts. DEC TU56 dual-DECtape drive (goes with my PDP-11/34) DEC VS60/GT48 graphics display (goes with my PDP-11/34) DEC RKV11D Q-Bus controller for RK05 disks (on my LSI-11/73 system) Originally, it only supported 16-bit addressing, but I added the chip and wires to make it support 18-bit addressing. I have never even heard of another of these controllers, so I assume it is rare. Things that I assume are non-rare include an IBM 82 card sorter, Cardamation keypunch, assorted paper tape gear, and a True Data card reader (on my LSI-11/73 system). All of this was operating here at one time or another, but the clutter has become so bad that it is difficult to get them connected (or even get at them) these days. I recently retired, so my #1 job now is getting rid of all the stuff I accumulated over my almost 50 years in the computer industry. I have three rental storage units full of stuff and the cost is killing me! Is it OK to post ads on this list? Alan Frisbie