Build a professional website which has several services/sections as the following:
1- Company directory (not market, no purchasing will be done on the website, and no prices will be available on the website), companies will register with their products/Services and which give users ability to search a company by their products/services and send a price request to number of companies by one message.
2- Page to post tender/bid for pricing.
3- Some users can create their page to receive and reply questions from the users and give consultancies.
4- Page to post new job opportunity.
5- Page looking for job posts.
6- Page to post Advertising by the users.
7- Page to post useful shares.