Heh, at 50p
[1] it would be be worth trying a Model M just for the experience even if it would be far too noisy. (Ditto a clicky FILCO but those won't be going for 50p anywhere!) I love clicky!!

Personally I don't see the resemblance of RISC OS 3.11
[2] to GEM, nor NewLook (the textured theme that in fact I did cover at the end of the article) to either Mac OS nor Windows 3.11. GEM itself is curious, in that, by 1985, like the Amiga, it already added proportional scrollbars that Apple failed to introduce until, what, Mac OS 8.5? GEM is also full colour. Funny how the different GUIs all exploded onto the world at once just after the Lisa and Macintosh were introduced.
The reason I wrote that RISC OS article is to preserve some of the knowledge of the innovation held within that system. Even Linux has an overt tendency to just rip off Windows and Mac OS GUIs, and I like to remind people that, although Apple and Microsoft were those fortunate to rise to the greatest prominence, they do not hold the monopoly of ideas, and so many great ones have become forgotten. (And then you have RIM, who seem to have gone out of their way to avoid even common wisdom. What's with opening a menu to submit a (the Enterprise Activation) dialog on a BlackBerry?!)
[1] Per tonywalk's signature which, to anyone reading this in the future, will say something different as nobody has thought of implementing COW for forum signatures yet.
[2] What is with "3.11"? I used to run Paint Shop Pro 3.11 in Windows 3.11. Version 3.14, though, I could understand.