questionshow do i find a past deal info (such as specs)?

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You have a few options including using the advanced search. By clicking the links on the deals that turn up you possibly could find a deal which has been reactivated unbeknownst to the original deal poster.
At the very least, it could take you to the vendor's site where you might be able to discover a similar deal.

(By "specs," are you referring to spectacles such as eyewear, or specifications?)

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Can you give us a little more info? That would help a lot.