If you want to give your credit card some exercise, head out to La Canebiere in 1st Arrondissement. Why not take a stroll along the port and watch the sunset while you're here? Splash some more cash at Centre Bourse.
6th Arrondissement is home to Cours Julien, so why not stop by during your stay in Marseille. Why not take a stroll along the port and watch the sunset while you're here?