I recently aquired a pristine green russian big muff. It looks brand new with the original box. all the knobs are there and even comes with the battery door. No crackly pots or anything. My band leader thinks its pretty much a museum piece and should only be used for practice or recording. That way it wont get messed up or stolen...
IMAG0558 by spaz21387, on Flickr
IMAG0558 by spaz21387, on Flickr