The main one in Sousse is the Soula Centre down by the Medina. It is an enormous building on several floors and you can get anything from key rings to carpets. It is a good place to look at first as it gives you an idea of prices before you even go into the Medina, though I personally enjoy the banter and barter.

All the supermarkets such as Magasin Generale and Monoprix are also fixed price and have a variety of things.

In Sousse you also have LA GROTTE and ARABESQUE with fixed prices.

Both shops you can find in the centre of the Medina. I like both shops very much.

Here the map:

http://i2.photobucket.com/albums/y34/pittiepit/lagrotte.jpg

and a picture

http://i2.photobucket.com/albums/y6/pewi/arabesque.jpg

La Grotte ( a small one) you can also find in the Medina of Hammamet Yasmine.

I like both shops very much.

Kind regards from the Netherlands,
Pittie