Import de bagages et d’effets personnels : Y-a-t-il des démarches douanières ?

I received a quote with a proposal for an air freight but I want sea freight, is this possible?

For shipping by sea, since shipping costs are high, you need a large volume to reduce these costs. The minimum volume to reduce these costs is 2m3.
If the volume on your quote is less than 2m3, air transport remains more attractive.