There are several sites like Etsy that allow the sale of antiques and vintage items, including the following: - Ecommmax

Chairish: Chairish is an online marketplace for buying and selling high-quality vintage and antique furniture, decor, and art.
Ruby Lane: Ruby Lane is an online marketplace for antique and vintage collectibles, including jewelry, dolls, figurines, and other collectibles.
1st Dibs: 1st Dibs is an online marketplace for buying and selling luxury antiques, vintage furniture, and designer pieces.
Trocadero: Trocadero is an online marketplace for buying and selling antiques, vintage collectibles, and art.
Antique Gatherings: Antique Gatherings is an online marketplace for buying and selling antiques, vintage items, and collectibles.
LoveAntiques: LoveAntiques is an online marketplace for buying and selling antique and vintage furniture, jewelry, and collectibles.