In my experience they come in one unit on VW Golfs. Ie. You replace the entire thing. Anyway, if you go for pirate parts, you're going to be around R600 out of pocket.
For the official bits, you're looking at about that for each wheel, so R1200.
R 1350 fitted for complete shaft (inner, outer and drive shaft) you can just do the outers as they are the ones that normally go first and make the cluck cluck noise.