Which stores can I find at the area Le Marais? And what's the price range at Noir Kennedy? Where's the American Apparel store?
The AA store is rue Vieille du Temple don't remember the number (120?) but it's almost opposite the APC store in the Haut Marais.
I was strolling down that very street just yesterday and from what I remember, you'll find on this street alone apart from AA and APC:
Sandro, Zadig & Voltaire, Madame à Paris, Yukiko (lovely vintage stuff), Vanessa Bruno, Manoush, Jamin Puech, Erotokritos, Olga (multi brand stuff), Ch.Ind, No Collection, Abou d'abi bazar (multi brands stores), Fragonard and that's
just the fashion part, you also have design and arts galleries plus cafés.
Streets nearby like rue de Charlot, Saintonge, Bernard and de Poitou also have lovely boutiques like Shine, AB 33, Estelle Yomeda, Moon Young Hee, and the new Isabel Marant store.
Of course, there's also the rue des Francs-Bourgeois which also carries a lot of popular brands: Darel, Comptoir des cotonniers, Antoine & Lili, Muji, Ba&Sh, Ted Baker, Penhaligon, Khiels, American Retro and so on!
Voilà! I don't think I can be exhaustive as this is one of the most lively and ever changing area of Paris, fashion wise.
There's always something new and you just have to wander and "get lost" to discover fashion treasures.