Not as much as for buying, as just for strolling around and getting an impression of daily life here, the market is an interesting place.
The central market building, a storage high building, is a good starting point for your discovery. Much of the market spreads out from this building onwards.
There is no shope so to speak as the Taureg will come to you or set up at your hotel. They will bargain and their first price is a joke. Be prepared to walk away and you will get the best deals. Some of the silver pieces will have the makers name stamped in the back or you can watch them make it in the city. Some will have ebony wood inlays in them. Not high quaility stuff but here it is about the destination.
What to pay: Be prepared to bargain and have small bills on you to get the best deals. Changing a 10,000 CFA note can take time.
I had some problems with my pants, so I decided to go and fix them. Around the central market there are a lot of "on-the-fly" tailors that fix you anything while you wait. So in 10 minutes I had my pants fixed, all for 1-2 euros!
If you want to buy touareg jewelery (silver...) there are no souvenir shops here. But don't worry, touaregs will come to you in the streets and offer you stuff. They would take you to theit tent, sit there "as friends", have a touareg tea, chat for a while, and then they will show you all the pieces "they make" (in fact pieces are made somewhere else and bought by the touareg who sell them to you). Then you have to choose which you like (Be careful, the ones you choose you will buy at the end). Then they say FIRST PRICE. The your FIRST PRICE. And so on till the 3rd DEFINITIVE price. And there you are!