I was doing pretty well with SEO and Adsense. I was able to get number one ranking for many keywords in my niche, pretty competitive and profitable keyword. I successfully made $8.5K last month from adsense. And I made a deal with big investor and agreed to sell few sites for $120K, it was pretty good deal for both of us. But today when I wake up and check my ranking all keywords gown down to 5th page. My sites were receiving 90 to 95% traffic from Google. Now my sites are in 5th page for all keywords which I used to be in top 3. Similarly adsense earning fallen from $400 a day to $20 today. My deal is about to complete so its total loss for me. I have checked for Google penalty but can't find one. All my sites were white hat and I have mainly done content syndication (or article marketing through blog networks) to get ranking. My main sites were about 2 years old and PR 4. No shitty direct scrapebox or xrumer links to main site. My main site was got almost 50K links according to majesticSEO. This is not the case for particular site, all sites gone same way. All sites are in 5th page. What do you think the reason behind it? Is it sandboxing or Google penalty or something of like this? I need help from expert to regain the lost ranking of the sites.