Sydney doesnt have much in terms of TF figure hunting Im afraid. Comics wise theres Kings comics - Pitt St., Comic Kingdom. There's also Kinokuniya along George St. at TGV building 3rd floor but the TF figures(reissues) they sell are at an overinflated price. There's Myers in the city as well but only if your after newer stuff plus they don't stock too well.
Wanted AM partner Vanguard, Myclones Dirge, G1 Victory Leo, e-hobby Dark scream ( the black version), e-hobby Magnificus
Parts- AM partner Basher-side guns, G1 Actionmaster Elite Windmill's blades[I][B]