I went to Dandenong Plaza straight after work. Are you sure you're not getting Dropkick and Stockade confused?
They had tonight: Scorponok, Landmine, Cliffjumper, Payload, Dropkick, Arcee, Recon Barricade and Camshaft.
The $15 price tag on the shelf was for another toyline, no mention of Transformers on it so no point trying to convince the register staff I should get a deluxe that cheap.