When in France and whenever possible, I like to visit the local 'Maison des Vins' to taste and select a dozen or so bottles from the local producers always at 'wine lover' friendly prices.
My favorite so far have been the Gaillac and Angers outlets.
Next on my list I hope, when I don't know, should be Maison des Vins du Minervois , 35 quai des tonneliers in Homps (Aude), near Canal du Midi.
I noted their selection of Magnums, including 'La Polissonne', a Grenache Gris-Roussanne white blend (2019) from Domaine JP Charpentier, round and carnal in the mouth according to tasting notes from La Maison.
(* Photo from Maison des Vins du Minervois Facebook Page)