Hi Matt,
You need to sign on to the REMLR forum, http://remlr.com/forum/index.php This is the Register of Ex Military Land Rovers, an Australian group and the forum is saturated with posts on Perenties, buying, them, using, keeping them going and updates on what are going through the auction sites. I have just come back from Australia and seen some of the Perenties that have been bought by collectors and they are usually in very good condition and well presented at auction.
regards, Richard