Your template has so many non-standard things in it it's hard to isolate exactly what's causing it.
But, I'm guessing that you're using something like Image Handler with some added javascript to do some sort of fancy popup/hover image enhancement ... and that's broken. You can see that by virtue of seeing the product's model number displayed below the image randomly with extra broken HTML tag stuff like a > symbol beside it.
And that's probably breaking the rest of the HTML on the page, thus making subsequent links on the page no longer functional, due to the invalid HTML before them.
Turn off those javascript enhancements until you sort out why they're breaking your page.
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