You can have a nice pizza for 8-9€ these days in Paris, a really good crepe for 5-7€, tasty bo buns (vietnamese noodle dish) are usually less than 10€ in the asian neigbourhoods, etc.
No, believe me. If you think that the pizza you get for 8-9€ is decent, take the time, once in your lifetime, to visit Naples. There are a couple of good pizza places in Paris, but prices hover around 15€ per pizza.
1. What makes you think I have never been to Naples? I've actually been there, and many places in Italy, over the years. There are amazing places, and crappy tourist places, just like everywhere in the world.
2. I said "decent", not "outstanding". You can get decent pizze in Paris for less than 10€ in any decent pizzeria (there are some bad ones, just don't come back to them).