Linkworkers is one of the best site from where people can buy and sale PR domains.
Linkworkers allow people to sign up free and give chance to generate money from their site and also people can buy PR domains in a very cheap rate. People who want to buy simply have to go to site and will have to sign up on it and than will have to start the campaign and hire workers than when worker do the job you can review the job and can pay for them. It will be a successful campaign with easy and effective.
For more information visit
http://linkworkers.com/toon.php