If you're starting in Le Marais - it feels like every second building is a vintage or designer store, If you want to visit them alll, you could spend 2-3 days here - its heaven!
Some of my faves in Le Marais are;
Nuovo - Select vintage and some of their own styles - fab basics.
Bobby - This is a chain but they probably have the best range for the best price in here. Worth visiting a few locations.
The Room - Across two locations they have a very curated and well kept selection of mid to high range designer items. Lots of Dolce, Moschino, Jean Paul Gaultier.
The Statement - More exxy but INCREDIBLE designer pieces. I have never seen a coat collection quite like theirs!
Omaé - Coffee spot for a break while you're shopping in Le Marais!
Merlot - Another fab coffee shop!
Dover Street Market - A store founded and curated by Comme des Garçons Rei Kawakubo is always on my hit list in any city I visit. (Other locations being London, Tokyo, LA NY and more!) This store is like no other; its more of an exhibition than a retail shop, they close twice a year to fully re do the store, so every time you visit its completely different! Of course its filled with some incredible designers you struggle to find elsewhere; Dries Van noten, Simone Rocha, sacai & Cecilie Bahnsen to name a few!
Place des Vosges - My favourite spot for a little break in between shopping, these gardens are surrounded by stunning Parisian buildings, you feel as though you have stepped back in time on a movie set.
Merci - A very fun multi level concept store! You'll find unique gifts, home wears, pottery, clothing and honestly anything you can think of in there! I purchased a very realistic baguette candle of course.