Finding serious clients can indeed be a challenging task for businesses, regardless of their stage of development. One of the hardest parts is identifying and targeting potential clients who are genuinely interested in the products or services being offered, and who have a genuine need or problem that the business can solve. This requires a deep understanding of the target market and effective marketing strategies to reach the right audience.

In relation to the specific situation you mentioned, where a tech salesman pitched a new product to an agency but was turned down, there are a few ways to handle such a situation:

1. Understand the client's perspective: It is important to try and understand why the agency didn't believe the product would fit in their environment or was too expensive. This can help identify any gaps or concerns that need to be addressed in future pitches.

2. Adapt and refine the pitch: Based on the feedback received, it is crucial to adapt and refine the pitch to better align with the needs and concerns of potential clients. This could involve customizing the product or service offering to better fit the client's environment or addressing any pricing concerns.

3. Seek feedback and iterate: It is valuable to seek feedback from potential clients who have turned down the offer. This can provide insights into any shortcomings of the product or pitch, allowing for improvements in future interactions. By continuously iterating and improving, the chances of finding serious clients increase.

4. Build credibility and trust: Serious clients are more likely to engage with businesses that have established credibility and trust in the market. This can be achieved through various means such as building a strong brand reputation, showcasing successful case studies or testimonials, and cultivating positive relationships with existing clients.

5. Network and leverage connections: Sometimes, finding serious clients can be facilitated through networking and leveraging existing connections. This could involve attending industry events, joining relevant professional organizations, or seeking referrals from satisfied clients. Building a strong network can increase the chances of finding clients who are more likely to take the business seriously.

In terms of how one may end up after facing such a situation, it can vary depending on the approach taken and the specific circumstances. By adapting and refining the pitch, seeking feedback, building credibility, and leveraging connections, businesses can increase their chances of finding serious clients. However, it is important to acknowledge that not every pitch will result in a successful outcome. Persistence, continuous improvement, and a willingness to learn from failures are key to achieving long-term success in finding and engaging serious clients.

Overall, the process of finding serious clients requires a combination of strategic marketing, effective communication, adaptability, and perseverance. By understanding the target market, refining the pitch, and building credibility, businesses can increase their chances of finding clients who are genuinely interested in their offerings.