Thanks a lot for all the information about the Leica R8 camera, James! I really appreciate that you took the time to look up the serial number.
As for yours-truly, here's an update.
The black camera I ordered came in, but the lens (which was timed to come the same day) didn't. In fact, it seemed lost in the mail between Nebraska and Illinois (and in these stormy times, things can happen). In deep despair and frustration, I found another lens for sale, at a lower price, in a store, not eBay, so I bought it... on Friday evening.
I contacted the seller of the first lens (a 28-70 f3.5-4.5) and he immediately opened a claim with the post office. Yesterday he told me he got some reply from them hinting that the lens was in the system, so one can assume it may come this week. In the meantime, the lens I purchased from a store in MN (a 35-70 f3.5) also may come this week. So in the end, I may find myself with two lenses instead of none.... but only one body. I'll decide later which one to keep based on ergonomics, because on paper each of them looks really good.
BTW, the camera isn't tiny... but it's not huge either. Since I had seen a video of the R8 with a winder, I looked for one and found an inexpensive copy in good shape that will add a bit of heft to the camera. Other than that... the dials feel exquisitely smooth and high quality, like a precision instrument designed to work well. Compared to my Nikon dSLRs, the buttons sit in a more natural position in the body and the viewfinder (even without a lens) is incredibly bright.
Once I have a lens I'll come back and tell you what it is to use this beautiful machine. For now... I'm off to get something done to take my mind off waiting for the lenses I ordered.