Is a pass worth it for you?
Bought separately, the big sights cost adults roughly this much according to Go City: Edge about $69, Top of the Rock about $65, Empire State Building (86th floor) about $57, One World Observatory about $48, Natural History Museum about $43, Intrepid Museum about $38, 9/11 Museum about $36, Statue of Liberty ferry about $26.
Two observation decks, the Statue of Liberty and the 9/11 Museum already add up to around $170 to $200, depending on the decks. What the Explorer Pass with four attractions costs is shown in the table above. Only count sights you would visit anyway. On citypass.com a $2 handling fee per ticket is added. All admission prices are on the attractions page.