>I don't remember why I ditched my last one. It's still in mint condition, been used about 30 months. I guess it was the left ctrl or left shift sometimes not catching. A proper cleaning may have fixed it, but at these single-digit prices...

Back in the days we (me and two partners, in the late 80s) were a small company who provided all kind of services, from writing custom software to buying the computers for the customer to cleaning computers, and we went the extra mile, when we cleaned the computers we would not only disassemble the computer, but we would also disassemble the and clean the keyboard (and all its keys individually!) except for the IBM keyboards, we learned the hard way that those were not easy to rebuild :)