Went to my nearby Sydney Tools today. Saw the deal.
Asked the guy, offer valid for minimum purchase of a two piece M18 fuel cordless power pack Milwaukee tool. Bring skin of another brand (listed: Makita, Bosch Blue, DeWalt, Hikoki/Hitachi, Hilti, Snap-on) that you want to change with. Maximum of three skin exchange.
Great for those changing brands. Also great deal to upgrade stuff (changing a Makita impact driver to Milwaukee Angle grinder saves close to $200). As usual, batteries not included.
Link to deal : https://www.milwaukeetool.com.au/campaign/redemption-day-2/ Credits to a fellow comment below.
How much do you pay after trading? Not enough detail really..