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Hi because I have not seen the exact stats on your site I cannot tell you this for certain but Normally I would use a tool like deep crawl as this would allow me to see how many URLs should have indexed and how many your site contains. Along with many other metrics. You say your seen a drop of search traffic by 80% over the last eight months and now it feels like you are getting no traffic? Normally that is a really bad sign as Google tends to take sites that do index out of the index prior to issuing a manual penalty some what of a warning. Because you have told me you did build links I am going to assume you took a link from any site you could get? Because this is honestly a pretty severe problem I would check Google Webmaster tools before going forward if you do not have an account with Google Webmaster tools all you need is an e-mail address you can sign up for free and check if you have been penalized? If you want to remove the links which you have built I would agree you should do this because briefly looking at your link profile I see a lot of very spamming links if you want to do it on your own I recommend http://www.removeem.com/self-serve.php If you want an expert to handle this for you I would call Ryan at http://www.vitopian.com/contact-us / removeem will tell you if it believes the link is bad and it does a pretty good job of doing that. However in these situations I really do not think it can substitute for human being. It depends on how much money you want to spend on saving this business I can tell you that I personally know people that have been helped by Ryan and are very happy with the results. Your question of should you remove your links that you have built I would say most likely answer is going to be yes but I do not know how you built them if you did something against googles terms of service absolutely you should remove them ASAP. I hope this is been of help, Thomas