I guess it's time to update this now that Myer has put up their prices today after Big W did after their June Toy Mania sale, which means the other retailers might follow suit.

Big W

KD Core - - - 20
KD Deluxe - - 36
KD Voyager - 50
KD Leader - - 95
KD Cmder --- 149 (unchanged)
-
SS Deluxe - - - 36
SS Voyager - - 50
SS Leader - - - 95

Myer

KD Deluxe- - 40
KD Leader- - 100
-
SS Deluxe - - - 40
SS Voyager - - 60