Short answer: it depends on what you value — for the absolute deepest low prices (flash coupons & heavy clearance) shoppers in Australia are currently finding the biggest markdowns on marketplaces like Temu; for reliably large, brand‑level discounts from known Australian retailers use THE ICONIC, ASOS (outlet & student offers) and department stores such as Myer or David Jones during major sale events. (reddit.com)

Why I say that (quick breakdown)

• Temu and similar low‑cost marketplaces frequently run large coupon/bundle promotions and huge percentage discounts on low‑priced items — good if you want the lowest price possible. (reddit.com)
• THE ICONIC is Australia’s biggest online fashion destination and runs frequent seasonal and event sales (and participates in large national events), so you’ll often find strong discounts on mid‑to‑premium brands. (en.Wikipedia.org)
• ASOS offers big outlet/clearance discounts, student discounts and regular sitewide sales (often up to ~50–70% in major events). Good for trend items and international brands. (marieclaire.com.au)
• Department stores (Myer, David Jones) and Aussie chains (Cotton On, City Chic, etc.) run large seasonal and EOFY/Afterpay/Black Friday style sales where discounts can match or exceed other retailers. (news.com.au)

Practical tips to get the best discounts

• Time purchases for big sale events (Afterpay Day, EOFY, Black Friday / Cyber Monday) — that’s when most retailers hit their deepest discounts. (newsroom.afterpay.com)
• Use student/member/newsletter codes, app‑only promos and outlet sections (ASOS Outlet, THE ICONIC sale). (myunidays.com)
• Compare total landed cost for international sites (shipping, returns, GST) — a low sticker price on marketplaces may be offset by shipping/returns or quality differences. (General best practice.)

If you want, I can:

• Check current live deals right now (I’ll look up the biggest active discounts across Temu, THE ICONIC, ASOS and Myer and list the top offers with links).