I'd call it a planchet flaw, not a true lamination. Looks like it goes too deep to be a surface lamination. But maybe I'm wrong. Nice buy.
The coin won't grade unless graded as a mint error. A severe planchet flaw like that would prevent it. Looks like AG to me. The error doesn't help and might hurt the value a bit, since collectors like their key dates to be error-free. For $72, however, I still think you got a good deal.
I think this is going to be a very successful flip. This coin is a monster and the planchet flaw does not detract from the key date (to me).