The price is to high.
For $500 I rather by 100 domains and use the same very transparent technique u'r talking about.If you'r lazy, you can buy 10 times more links from another source for the same price (there are alot of places where you can do that). But since you'r not selling your shit to SEO's, good luck! I am sure there's a noob out there that would prolly fall for it
