After a quick pop over to my Amazon wish list, the following 4 have been pretty unattainable to me for as long as I've been looking:
Galois Cohomology of Algebraic Number Fields, by Haberland
Class Field Theory, by Neukirch
Arithmetic Geometry, by Cornell et al.
Number Theory, by Borevich and Shafarevich
(So if anyone has one they want to get rid of...)