Yes, you can.
Buying from a game currency seller is the fastest way to get Fo76 Caps.
In NW, players utilize the primary currency, known as coins, to buy gear, resources, real estate, and even entire settlements.
Of course you can, but your character must have the required items and equipment before you placing an order.
To get a lot of gold fast in New World: Aeternum, you can find a trustworthy online game currency seller, like MmoGah, to buy coins.