Boldier butter is 5, Izney 3,2 and both are ...

Boldier butter is 5, Izney 3,2 and both are 0.5 cheaper than Bon Marche.
Perishables are very convenient for long-term stays because they are at the same price as carrefour.
There are many spices and seasonings, and some can be used as souvenirs.
For truffles, there is a popular Maison (Japanese style) on the 1st floor, with a rich lineup and the popularity of salt and chips. I often see them buying in bulk.