It'll be a bit of a long answer here of course. Cherry has had a long history. I dont know as much as some, but I can fill you in on a little.
So there are older cherry keyswitches that predate their popular MX line. One of the more popular ones is the M7 switch. There are older ones like the M87 (I think that's what it's called) and the M6. These were from about 1984-1986 or so.
They had a fully backlit programmable keyboard with individually addressable LED's in 1984 though.
The cherry mx-line of switches came out in the late 1980's, 1987 or thereabouts, I think. They started with just the "black", but then they added blues, browns, etc.
As far as cherry keyboards of interest to collectors, the G80-5000 split ergonomic keyboard is popular. It's sort of the M15 of cherry. There are also keyboards with popular keycaps like the russian ones on the ESA-3000 (I think).
Of note is that most cherry-branded keyboards are PCB mount. I would say they feel different than a plate mount keyboard, but I don't know if that's a specific reason to collect it.
Their POS programming software is terrible.
Of course, my cherry company history is a little rusty. Please, if Im incorrect, someone correct me.