Buying more than one thing?
Three products at their three cheapest stores means three lots of postage, and that is routinely dearer than buying the lot from one slightly pricier shop. Add a few products to a haul and this page works out which stores to split the order across, postage included.
Where it can. Most Australian skincare shops advertise a free-shipping threshold and never state what they charge below it, so a small haul often has no delivered total we can stand behind. The page says so rather than guessing.
Look for + Haul on any product page.