Actually, there are several websites and platforms that facilitate exactly what you described. They are commonly known as "request-for-proposal" (RFP) or "service marketplace" platforms. These platforms allow users to post their requests for specific products or services and receive offers or proposals from other users who can fulfill those requests.
The reason you may not be aware of these platforms could be due to several factors:
Lack of Awareness: It's possible that you haven't come across these platforms or haven't actively searched for them. They may not be as well-known or widely advertised as some other types of websites.
Niche or Industry-Specific Platforms: Some request-for-proposal platforms cater to specific industries or niches. For example, there are platforms specifically designed for freelance services, such as Upwork or Freelancer, where clients can post job requests and receive proposals from freelancers.
Local or Regional Focus: Some platforms may operate on a local or regional level, focusing on connecting users within a specific geographic area. This localized approach can limit their visibility to a broader audience.
Evolving Market: The online marketplace is constantly evolving, with new platforms emerging and existing ones adapting to meet changing demands. It's possible that the landscape has changed , and new platforms have emerged.
To find platforms that match your specific requirements, you can try searching online using keywords like "request for proposal platform," "service marketplace," or "post requests and receive offers." Additionally, exploring industry-specific forums, social media groups, or communities could lead you to platforms or networks where such interactions take place.