Searching Paris Apartments.....

It has comes as a surprise to me that a Paris apartment (to rent or to buy) goes up in cost when there is a Lift in the building. Some apartments are on the 7th floor, in glorious old buildings but have no lift. Perhaps that is why writers starve in Paris Garrets? Or why Parisian women are so slim? Never the less they are delightful to view. The apartments I mean.