On a budget, Saint-Germain-des-Prés still earns its price.
Free to wander (cafés pricey)
The Paris of Sartre and Hemingway: sit at Café de Flore or Les Deux Magots, browse the art galleries and antique shops, and watch the most stylish foot traffic in the city. It's polished and pricey — a stroll-and-watch quarter more than a sights one.