An inexpensive wine shops a block south of the cathedral
Unassuming, not overpriced, and just two blocks south of the Duomo—in short, the perfect store to shop for Tuscan wines.
Don't be discouraged by the paucity of bottles you'll see when you first enter. The large ground floor room is reserved more for chocolates and other fine edibles.
The bulk of the wines—from refined vintages to excellent Tuscan table vino—are in the large cellars downstairs.
I was delighted to discover that one of our partners, Select Italy, can arrange for guided wine tastings at in the cellars (sometimes in conjunction with some sightseeing):