noun
A business or person that buys products and resells them, often in a commercial context.
この商品は再販業者を通じて購入できます。
This product can be purchased through a reseller.
販売業者 is a general seller or distributor, while 再販業者 specifically resells goods originally obtained from another source.
Compound of 再 (re-), 販 (sell), and 業者 (business operator).