Anyone who’s looking for a good dictionary should check out Amazon Japan. There are super cheap copies of old editions of Kenkyusha’s New Japanese-English Dictionary, aka the Green Goddess. It’s famous for loads of usage examples. The old edition is also good for beginners since entries are listed in alphabetical order. It’s a steal at 786 yen.
I would be remiss if I didn’t provide this link (via Wikipedia) to Tom Gally’s writings. He worked on the fifth edition of the dictionary. You can read specifically about the dictionary here, here, here and here.