were you in SA at time of getting busted? unlucky if you were, the fine would've been significantly less in Vic, we get shafted hard here in SA!!
Earlier this year i got busted doing 9kms over in vic, and then couple weeks later (i know should've learnt my lesson blah blah) got done 9kms over in SA, from memory the SA fine was about $180 more expensive.. Its bollocks