Here I have for sale a pair of Avid BB5 brake calipers (both have pads with lots of life, 70+%). They come with a new inner+outer front cable (long for a 150mm fork) and a braided used but excellent condition rear cable. Both brakes have been in my bits box for some time but feel smooth. They would probably benefit from some grease though.
Both brakes are actually really powerful with the control of a cable brake. Basically a maintenance free set up.
They come with some very cheap levers just to get you going. I only have front 160mm/rear 140mm IS mounts, no rotors. If you want the mounts ask as I wasn't going to include them.
Many thanks, Jay