Based in Stockholm, Nathalie Schuterman focuses on international high-end fashion both in store and online, and carries brands such as Altuzarra, Balenciaga, Céline, Kiini, Loewe, Mansur Gavriel, Proenza Schouler, Vetements and Tabitha Simmons.
Their selection of designer bags and accessories is particularly good - it is definitely a must for curated Scandinavian minimalism with the chic edge.
I would also recommend Holly Golightly - the Danish match - for more bohemian Scandinavian aesthetics. Look for pieces from Aquazurra, Marni, Jil Sander and from many Danish natives including Sophie Bille Brahe and Saks Potts.
Tuchuzy is a legendary boutique in Bondi Beach in Sydney - no doubt a must-go while in town after a dip in the ocean, but luckily they also have an online store, usually worth any duty fees you might face.
The online store carries most of same brands as the boutique including Céline, Re/Done, Chloé and ATP Atelier together with the best labels from Australia - Dion Lee, Matteau Swim and Bassike. In my opinion they have a top-notch selection for effortlessly cool and sporty women.
My Chameleon is another Aussie favourite of mine to which Maria introduced me when I was looking for something particular last summer. They carry surprisingly many rising contemporary designer brands like, for instance, Jacquemus, Illesteva, Toteme, NewbarK, Ellery and Eytys, literally from all over the world.
Vestiaire Collective is a luxury online buying and selling destination, and one of the only places to buy pre-loved pieces from Chanel, Hermés and Céline as well as gems from previous seasons.
I have heard stories of poor customer experiences, but so far I haven't had any issues, on the contrary, it has been the easiest way to sell pricier high-end pieces.