Buy & sell direct online
You do not need a hyphen between "Direct" and "Online" unless they are modifying a noun (e.g., "A direct-online marketplace"), but for a general call to action, keep them separate. buy & sell direct online
This is the standard for marketing headers. It makes each word feel important and intentional. Buy & sell direct online You do not
BUY & SELL DIRECT ONLINE
Buy & Sell Direct Online
The most professional and visually balanced way to write that phrase depends on how you intend to use it. Here are the three standard "proper" formats: "A direct-online marketplace")
