Triton Clutch issues? **Warning Newbie**

Hi,
I have a manual 98 Triton DC 4wd with 130K on the clock. Recently there doesnt seem to be as much direct input from pedal to the back wheels, so I am thinking the clutch is slipping.

It is particularily noticable from 2nd to 3rd, as the engine overrevs for a second before full power goes to the wheels.

So my questions are:
1. Am I right in thinking Clutch?
2. Is 130K normal for Clutch issues?
3. what would be typical charge from a workshop to replace it?
4. If so, does anyone know a decent mechanic in Adelaide that wont rip me off blind?

Thanks all, any help would be appreciated, I just dont want to roc up a mechanic and get the usual 'ums' 'ahs' and 'Its gonna cost ya'.

If I'm missing something (And yes, I'm releasing the clutch pedal:-)) let me know

Ta