Hey mate,
I have this exact model in Ten-Key Less with brown switches.
The problem is, the switch for the Spacebar has snapped. It works (I am using it now), but needs to be soldered to replace it to a new switch.
Naturally I'd sell it for less, it might be a little bit of a project for you if you're interested.
I'm also in Sydney which may cause issues with postage.
Let me know if you're interested!