Yes — you can buy affordable “designer‑inspired” (dupe/“inspired by”) perfumes online in Australia. Plenty of local sellers and marketplaces offer lower‑cost fragrances that aim to mimic popular designer scents. Examples and where to look:

• Australian indie brands and shops that sell “inspired by” fragrances (affordable bottles ~A$10–A$50). These include sites selling house blends marketed as “inspired by” Dior Sauvage, Chanel Coco Mademoiselle, Paco Rabanne 1 Million, etc. (beautys.com.au)
• Discount/chain retailers and beauty stores often carry budget fragrances marketed as alternatives to high‑end perfumes (news reports have noted inexpensive alternatives sold in stores like Big W). (news.com.au)
• Marketplaces (EtSy, eBay, Amazon.au) and small Aussie shops sell rollerballs, body oils and EDPs described as “dupes” or “inspired by” — good for trying many scents cheaply or buying decants. (EtSy.com)
• Blogs and beauty retailers list popular inexpensive dupes for well‑known designer fragrances (useful to compare notes and reviews). (dbcosmetics.com.au)

Buying tips

• Look for “inspired by” or “reminiscent of” wording — that’s legal. Avoid sellers claiming to be the original brand (counterfeits) — illegal and lower quality.
• Read recent customer reviews (longevity and similarity vary a lot). Check photos and seller ratings on marketplaces.
• Order a small size or decant/roller first if available to test longevity on your skin before buying full bottles.
• Check shipping, returns and ingredients (alcohol content, allergens). Some indie sellers note Australian‑made formulas and ingredients. (beautys.com.au)

If you want, I can:

• Find a short list of Australian shops that ship to your address (with prices and sample/return policies), or
• Search for specific designer scents you want affordable alternatives for and list likely matches.

Which would you prefer?