Broken or Spare HW/FW motors

In my latest series of how much can I bodge one robot...

I'm after Featherweight sized motors up to heavyweight sized motors that people either have spare and don't mind parting with or any broken motors people don't want (I've gotten reasonably adept at repairing them, and even if they seem completely gone you can generally get spares out of it). The bigger the motor the better, this is for various fighting robot projects of mine.

I should be at the Guildford and the Milton Keynes event, though I can cover postage if that's better.

Thanks,
Alex