I have an Atari 800XL PAL unit with Supervideo XL mod that I paid a good bit for from Germany. The keyboard in it had a stuck key. I confirmed it was mechanical. Air did not help so I took the membrane loose. Apparently a mistake. Replacing after cleaning, only the function keys work. Reseated cable repeatedly.
I was going to buy another unit on eBay and take the keyboard, but they are too expensive, so I will not be watching scene demos on this but shelving it, it seems. I can't afford a new one. (Someone is currently selling a PIECE OF FOAM from the box of a 600XL for $32....)
Before I close the door on my A8 experience for probably a decade, I wanted to see if anyone had a spare keyboard for the unit that I could buy for a fairly low price. Probably not, but I wanted to take one more chance before I put this broken system away.