It sounds to me that you tanked your clients product page, what are you thinking with your 750 spammy blog posts, come on, get real.
Think you can't tank an Amazon page? Think again lol.
Google ranks pages, and Google tanks pages.
And if you're very unlucky they tank your whole site, but that would obvious never happen with a site like Amazon.
You seriously have no clue what you are doing.
250 paid WP links in 10 days and you don't consider that too much, I can only say OMG, you should find another job.
Google ranks pages, and Google tanks pages.
Apparantly not obvious enough for you.
Oh I do understand Amazon is a parasite and you still think you can blast it with anything, but the reality is that you just tanked that page and I'm not even a little bit surprised about that, maybe you should start offering negative SEO, you're pretty good at it
Ok let me give you one hint why that page tanked: DIVERSITY
The reason that no one else responded to this thread is cause it's so bloody obvious to everyone that knows a tiny bit about SEO. It truly is a shame that people who don't even know what dynamic pages are offer SEO for clients.
It looks to me that g00gle is filtering all Amazon and ebay pages for 1 product KW. This makes sense, since the most pages are very similar in the title, the description and they come all from the same domain.