Tout pour la femme et l'enfant: Niamey's only "department store"
Next to the petit marche, Tout Pour has a little bit of everything. Imported, of course, and at very high prices, but if you need a halloween mask, a French version of Scrabble, ice cube trays, or whatever, you can probably find it here.
No name shop near the Lycee la Fontaine: Baskets from Catholic Mission
From this little no name shack near the French school, you can purchase baskets made in Nguimi, near Lake Chad in far southeastern Niger. The proceed go to aid Catholic relief work in the country. Basket are very reasonably priced, small ones can be had for US$0.50. The largest wouldn't be over US$10, and these a big baskets! The prices are set, the women running the store pleasant
What to buy: Baskets!
What to pay: US$0.50 ~$10.00
Wadata Artisan market: Wadata for what you want
The Wadata Artisan market, not to be confused with the local Wadata market just down the street, was built with aid from Luxembourg. In the main building, you can find many of the local crafts for sale with reasonable set prices for fairly high quality work. Crafts include leather boxes, shoes, jewelry, fabrics and clothing, pottery, baskets, etc. It is a good place to at least look around, so you can get an idea of prices, and where to start bargaining if you want to buy on the street.
Women will come to you home to do it: Get a henna tattoo
At many beauty shops you can get a henna tattoo. Alternatively, someone will come to your house or hotel to do it. The process involves putting the henna "mud" on your hands or feet, letting it dry, rubbing vinegar over the design, and then smoking your hands and feet in a clay pot.
What to buy: Henna tattooing is strictly for women
What to pay: depending on the designs, no more than about $5-$10 US total