Rebuilt Calipers , what to look for or just buy expensive new German Ate ?

These are for a 1978 Porsche 911 ,  not my car but the guy down the street , 

The car has been sitting for years and he wants to get it back on the road , 

Brakes were bad when he parked it , so he wants to replace the calipers and master cyl.

German Ate ones are pretty expensive , rebuilt is half the price of new ( or less )

But what is "rebuilt" these days and what does he need to look for ?

Thanks for your ideas

Can't you just get rebuild kits and diy? Should be quite straighforward.

Aluminum or cast iron? Rebuilt generally means pop out the pistons, hone the bores, replace piston seals and dust boots, replace slide pins and boots if so equipped. Sometimes it means paint or plate the cleaned housings before reassembly. Depends on the rebuilder.

avoid "Cardone" brand. Hot berkeleying garbage.

Check Pelican Parts or ECS Tuning, they have lots of options for Porsche parts and are have really good reputations.

I have rebuilt all 4 are calipers on my mercedes, just pull them apart and reseal them.  Only word of advice is to make sure to mark where the metal dust shield, dust boot retainer is indexed if it is.  You use compressed air to push out the pistons, figure which on moves, clamp it and push out stuck piston first. It is like $20 a wheel in seals.  

benzbaronDaryn said:

You use compressed air to push out the pistons, figure which on moves, clamp it and push out stuck piston first.

good advice to clamp the piston(s) that move and concentrate on getting the stuck ones un-stuck.

more good advice:  use a block of wood to stop the pistons.  DO NOT stop them with your hands.  100 psi x a couple square inches of piston area = a couple hundred pounds of finger-breaking force.