I got my Acorn Atom from eBay in January 2020. It came expanded to 12K of RAM and had a BNC port added to the back connected to the composite video header. I had to redo the wiring for the BNC connector and also re-solder the pins on one of the keyboard keys to get it working fully again. After having the machine running but no software for it, I invested in an AtoMMC2 interface. This allowed me to load up the Atom software archive onto an MMC card and run whatever software I liked without the need for tapes or floppies!