My domain is about two weeks old. I'm not an SEO expert, and I don't use SEO for direct money making, it's just to promote my photography business. Things I've done so far: Manually registered on hundreds of business directories. Posted backlinks on lots of blogs. Submitted videos, articles, and other 2.0 content to various places, all linking back to my site. I've got about 3% keyword density on my title, properly tagged, with h1, bold, etc.. Everything, far as I can tell is perfect. I've purchased a few fiverr gigs, nothing crazy, along with the .EDU service on here, and the 15k backlink service. At the beginning, I was ranking quite high. My best for my keyword was #9, which was the first page of Google. I've bounced around a bit, but never dropping below page 2. After I purchased the 15k link package from one of the guys in the buy/sell forum, my SERPs have started dropping. I'm now at the top of page 4. The guy provided me with 28,000 links. Is this kind of drop to be expected, or have I been penalised somehow? I don't think I've been too bad as far as black hat SEO goes. I've done a little, but mostly I've just built a web presence by hard work. Any opinions?