If you want to give your credit card some exercise, head out to Cours Mirabeau in Aix-en-Provence Historic Centre. Splash some more cash at Les Allees Provencales.
If museums are on your list, you might want to check out the upcoming exhibitions at Granet Museum in Aix-en-Provence Historic Centre. If you want to see more of the museums in Aix-en-Provence, you can easily walk to Musée des Tapisseries.