Not all links are equal. You need to examine the page rank of the website and the number of outbound links from it in order to value the worth of the transferred link. This article tells you how to calculate the link value of links. It must be stressed that links should be relevant to the webpage you’re linking to an do not use link farms or irrelevant websites with low quality content. This post explains how to calculate the transferrable page rank of a link so you to gain maximum transferable value.