I went to Amazon and found an x9performance illuminated keyboard with oversized lettering for old folks on the keys for $30. I really like it so far, and with one touch you can change the color of the backlighting. (seven choices) Just to see if it could be fixed, I contacted Logitech CS and chatted online with a rep. Nope, they don't have a repair capability, and the keyboard was LONG out of warranty or replacement, which I knew. I told the gal (Via Chat) that I was not adverse to paying a reasonble fee / shipping to have the key replaced, but at this point was not interested in paying two or three hundred dollars to replace the keyboard, I'd stick with the cheap keyboard with the two year warranty. I thanked her for her time and moved on.
I got an email about five minutes later saying she was going to look into the matter and see if there was anything they could do for me. I told her that was fine, email me if she came up with a solution. In the meantime, this cheapo keyboard types pretty good and looks cool in the dark.
$350? For the replacement? Not. I think we paid about $100 back then.
(The x9 normally has a one year warranty, but if you register the keyboard within 14 days of purchase, you get an extra year.)
