Opéra BD
Comics Bandes Dessinées are a serious art form in France and even regular corporate bookstores have a good selection, but it's much better to look for them where they are really appreciated, in one of Paris' many private BD dealers. This one is friendly, well stocked, and keeps late hours so pay them a visit if you would like to pick up a copy of one of the many volumes of Lone Wolf and Cub in French.
Over the last decade, the rue des Francs-Bourgeois has become a shopping destination for clothes and accessories. Go during the July or January soldes and pick up some Anne-Fontaine outfits, Camper shoes, or trendy mens clothing at Melchoir at bargain basement prices.
Marché aux Fleurs et Marché aux Oiseaux
On the north side of the Ile de la Cité, the main island at the center of Paris you'll find a burgeoning daily flower market, where you can buy just about any type of flower, and oddly enough a range of exotic tropical birds.
Mariage Frères
If you love tea, you'll love this old salon de the in the Marais.
B.H.V.
Is a general store with most of everything : clothes, perfumes, furniture, you name it --it's especially famous for its basement section, dedicated to handywork & DIY --think of it as a small Home Depot in a basement... though with French hardware and house and garden accessories that look distinctive in other settings.