Cost of living in Marseille (France) is about the same as in Buffalo, New York (United States)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 404 prices entered by 51 different people.
For example, to keep the same standard of living that would require $4,000 in Buffalo, New York you would need to make just about $3,996 (€3,493) in Marseille.