According to the text, a wholesaler is a person or company that purchases goods in bulk from manufacturers or producers and resells them to retailers, other businesses, or commercial establishments. They act as a middleman and often have large warehouses, shipping and trucking contacts, and a significant amount of capital. Selling goods wholesale can result in a quicker profit, compared to being a private label seller. Real estate wholesaling involves buying from motivated sellers and selling to other real estate investors.