Hello,
I except $800 for the entire work. My link-building method is simple and ethical. Its the effective 3-way technique. I keep vigil of all my past links, if any link got disappear within 6 months due to site problem or any other issue then I replace the link immediately. I think you are already aware of Google's new link dampening theory, for desired ranking result links should be in place at least 4-6 months. Please check PMB for more.
Greetings,
Roy