I just scored a nice heavy IBM clicky-keyboard in a charity shop for £notmuch.
I'm not sure exactly which model it is, however, since it's lost its label underneath - but other than that (and blank keycaps where Esc and KP. should be) it's in really good condition. It has detachable AT-style cable, lovely noisy keys (all working!) and weighs significantly more than my laptop!
Attachment 70803

