Prices down under....
I usually use a site called Kelly's blue book but I don't think it would be useful in Australia.
Look near the bottom of the page and you'll see regional links from Australia. Seek out a user there and ask their opinion.
I know, Gunsrunner is from Perth and will probably have some idea. He is a mechanic of the 787's and pretty good one at that. So, seek him out in a PM if need be and ask his opinion........:cheers: