Albert Messiah's Quantum Mechanics, as of this moment on Amazon:
At least one reviewer seems to favor the early edition, because it includes more history.Used Paperback (John Wiley 1961): $4.75.
(Dover July 6, 1999): $900.[Another copy is available for $2,497.30, plus $3.99 shipping.]
You can sell yours back to Amazon: $0.14.