There's at least one fanatic who sells Atari 800XLs (and other Atari systems) on eBay, and he does things like test, refurbish, and update with HDMI interfaces,

There's at least one fanatic who sells Atari 800XLs (and other Atari systems) on eBay, and he does things like test, refurbish, and update with HDMI interfaces, etc. I don't disrespect what the remake folks are trying to accomplish but I tend to think dealing with the refurb guy might actually be a more rewarding experience, with a simpler path towards getting support if it's needed.