What should Bob include in the subject line of his follow-up email after starting negotiations?

Including "Following up: Your [customer goal] pricing options" in the subject line is effective because it directly addresses the customer's needs and focuses on the specific goal they are aiming to achieve. This approach personalizes the communication and reinforces the objective of the follow-up, which is to provide relevant information regarding pricing options that align with the customer’s goals.

The subject line sets a constructive tone for the email, encouraging the recipient to engage with the content as it suggests a continuation of a previously meaningful dialogue. By referencing the customer's objectives, it demonstrates Bob's attentiveness and willingness to assist in meeting those goals, fostering a sense of partnership rather than merely pushing for a sale.

In contrast, other options might create a sense of urgency or pressure, which could be off-putting. For instance, terms like "Urgent" and "Last Chance" imply a high pressure situation that may hinder constructive conversation. Similarly, a subject line such as "Meeting Reminder" suggests a focus on scheduling rather than the content of the discussion itself, which may not resonate well with the customer at this stage. Therefore, the choice that emphasizes a follow-up relevant to the customer's goals is the most conducive to maintaining a positive negotiation atmosphere.