hankS said:
Currently a new 10Oz from perth mint is going for $283 (delivered)
Referencing a new 10Oz Perth mint bar as a starting point, the only additional value it has is either artistic or historical - Such things are entirely in the eye of the beholder. To my eye it has no artistic merit: Its a bad mould poured sloppily.
Its collectors premium is as a historical anomoly and as such the right collector might pay significantly more... but if you get $1000 for one of these I wouldn't be surprised if counterfeit versions started popping up because there is little skill required to reproduce that level of quality.