How much to fix the clutch of a 1981 Nissan datsun 280zx?

Seller says clutch is stuck down. Can I it myself or if I take it in how much am I looking at?How much to fix the clutch of a 1981 Nissan datsun 280zx?a hydraulic clutch has 2 cylinders, a master (the pedal) and a slave on the tranny. one of them may be gone, a line between the two may have burst, or the pressure plate may have broken. the first 3 not too bad, last one expensive.