I Think My Site Is Penalized/Sandboxed/Deindexed. Looking For A Consultant

Hello, I think my site is penalized.

It has 15000 pages indexed, but is nowhere to be found on a search for "website name" actually it's 670th in google.

link:www.websitename.com used to show yahoo directory, the only indexed link in google (170 are indexed in yahoo site explorer).

Anyway, I need a consultant. Please PM me w/ any offers to help me figure it out or get out of the situation. Thanks!

It's a 14 year old domain (which I bought around 6 months ago) I built out the site (which took a long time) and it's legitimate content.

I can't imagine why they would ban it. Thx again..