A customer post his offer and the provider must pay a certain amount in order to get the customer's contact details. One good example of the site that uses this system is language-school-teachers.com ($3/contact)
What do you think of this?
Any opinion is highly appreciated. I plan to charge just $1 per contact but will increase to up to $2/contact in the future. My custom script is already done. I'm just finishing some important features to add.