A seller or vendor — a person or organization that sells goods or services, ranging from individual sellers to corporate sales divisions or shops.
ネットオークションで信頼できる販売者かどうかを確認してから買った方がいい。
It's better to check whether the seller on an online auction is trustworthy before buying.
この商品は正規の販売者からのみ購入してください。
Please purchase this product only from authorized sellers.
販売者と購入者の間で契約が結ばれた。
A contract was concluded between the seller and the buyer.