Otterbox FRE Lifeproof Magsafe Case for iPhone 15 PRO Max $54 + Delivery ($0 C&C/ In-Store) @ Harvey Norman

JB Hi-Fi is selling it for $129.95, you can price match and then user your perks coupon/gift cards/credit card offer etc to save more $$

Defender XT iPhone 15 Pro Max – Clear is also on sale for $48:
Defender XT iPhone 15 Pro Max – Black $48:

Otterbox is famous for making durable but expensive phone cases.