Looks to me to be a terminal keyboard. It's a bit similar to some of the Televideo keyboards, but I'm not sure if it's an actual Televideo or some other brand. Almost certainly it's not clickey, and as for being very rare, that's quite subjective I guess, but if the seller cannot even identify it, I find it completely bogus to be making any sort of statement about how rare or common it is. Whatever the case, I doubt there's a very big market for most terminal keyboards, so unless it happens to be something very special, the price seems totally ridiculous to me. I might not mind spending $20 - $40 for some unknown keyboard that has some nice aesthetics, but $140 for something which doesn't even look all that appealing, and probably has crappy linear switches, I don't think so.
