Signature Links for SEO

Forum signatures help with SEO. A forum user's profile might have some credit and pagerank too. The signature links have some value, but definitely not as much as one way back links from another site. Some Reputed Forum Users offer to buy forum signature links.

Some forums have no follow for their public threads.

It would be great if one is involved in niche forums related to his/her site. Once you've become the right contributor to the community and you've written something interesting threads, you are bound to get visitors to your website through those signatures.

Signature links hold very little value for SEO and buying them is a waste unless its clicks you are looking for.