 South Korean internet conglomerate Naver Corp KR:035420, US:NHNCF said early Tuesday that it agreed to buy social commerce marketplace Poshmark US:POSH cnx.cmd.pushfunction var videoId decodeURIComponent; cnx playerId: 0a52d238-33b5-4c04-ba5e-323e192cfbe8, mediaId: videoId.renderb8b49474e42e4a61905a1353db504ac9; ; for 17.90 per share in cash, or about 1.6 billion. 