Buy | & Sell Direct Online

This creates high impact and visibility, though it can feel "loud" if used for more than a few words. Quick Style Tips

Which of these fits the on your website or ad where you plan to place it?

Using the symbol is generally better for digital layouts because it saves space and creates a visual "anchor" between the two main actions. If the tone is very formal, use the word "and."

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:

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.