1975 Sep. 25, Vincent Canby, "Redford a CIA Eccentric in Three Days of Condor" (film review), New York Times, p. 60:
In the screenplay by Lorenzo Semple Jr., and David Rayfiel, Turner very early on stumbles upon the existence of a kind of super-C.I.A. within the C.I.A., after which his life is not worth a plug nickel.
Usage notes
Of the alternative forms of this idiom, "not worth a plugged nickel" has a longer usage history than "not worth a plug nickel."