Came across some Cats near Home Hill in Queensland.   The gentleman who owns them wishes them sold.
They are as follows.   RD4, 4G7098.   Track gear is reasonable, as is tin wear on track.   No blade.   
D2, 3J1577.   Good parts machine.
D2 4U 6907.  Good for parts.
Grader, 21H operational.
Also a 621J which I know very little about, 3306 with sleeve metering fuel system.
And a D9G (66a785 I think) Great track gear.   Engine belived to have failed (overheat)   4 barrel rippers. Hydraulic angle blade.   Pony start.

Any interest let me know and I'll put you in touch with the owner. 

Thanks for the heads up, hopefully someone grabs them before they go off to China as scrap.

Can you send me his ph no?

Mans name is John,at Homehill.   0438 825 290    Looking for $1k each for the RD4 and the 3J   $2K for the D2.