Where is the best place to Buy Backlinks?

You should answer your own question after analyzing serveral proposals instead of going for a single answer. Many people may recommend their own linking service saying it's the best, but only when a number of persons confrim it echoing that opinion, you will find it is really.

I would suggest do a reasearch through Google, and checking people's reviews to find what it's considered the best one.

you can submit to directories list like www.suggest-url.org