It's quite likely that the ebay ones are imports that dont carry the A tick.
http://www.acma.gov.au/WEB/STANDARD/..._10,pc=PC_1728

Snapper wrote:
> I'm looking around for some new mobile phones. I've not decided yet
> exactly what I want. However, the phones that I have looked at can be
> had for considerably cheaper online, such as Ebay, for example, than
> if I go into one of the telcos' shops.
>
> For example, the Nokia N95 is $1,195 outright via Telstra. Or between
> $800 and $900 on Ebay.
>
> For example, the Motorola V9 is $350 to $500 on Ebay. Telstra's price:
> $829.
>
> There are similar price differences for the other networks that I
> quickly checked.
>
> How can these Ebay sellers flog them for so much less than what
> Telstra, as an example, sells them for? Why doesn't Telstra try to
> compete with this market?
>
> Has anyone had any success negotiating a price break when buying
> outright from Telstra?
>
> Last year when I was in the market for the Treo 750 none of the shops
> that I visited were interested or couldn't drop below the $1,095
> "rrp" mark. Yet I bought one off Ebay for $600.
>
> Someone's making a lot of money here, and I daresay that the EBay
> sellers aren't giving their phones away...