18 games for 20$!! Nothing really special, but good deal in my opinion.

1.      clu clu land
2.      super mario bros/duck hunt/world class track meet
3.      donkey kong 3
4.      to the earth
5.      excitebike
6.      top gun
7.      kung fu
8.      wood& water rage
9.      pictionary
10.      double dribble
11.      dr Mario
12.      yoshi's cookie
13.      f-15 strike eagle
14.      silent service
15.      faxanadu,
16.            bases loaded
17.      double dragon II
18.      super mario bros./duck hunt

Are either faxanadu or wood & water rage rare?

That is a good deal for all those games....about a buck a piece with some nice titles in there. No those two games are not rare at all but still a great deal.