I think I ended up giving mine away. The wife was all about clearing out the office room closet and I had 2 Indy's and a Challenge L in there along with at least one SGI keyboard. I think it all went to an electronics recycling center.
The were pretty decent keyboards for rubber dome. I supported a couple hundred SGI's for a while with a mix of workstations (including my desktop at work) and servers so I got used to typing on them. I still kinda miss Irix. It was a good operating system.