That's a damned good peel! The 3 on the back of the cover indicates that it was pressed at the Scranton, Columbia plant. All looks legit and a great find! Should have an orange Capitol inner sleeve with it.
If I had to put a price on it, judging by the photos I'd say it was worth around the $150-200 mark, though might sell for more if the disc was in great condition and it had it's original orange Capitol inner sleeve. The market out there is a bit all over the place.