I've never really found any nice clothes at good will, although i still have this retardedly slutty miniskirt from there
I did find a copy of herman hesse's siddharta there (which was great cause I went there to look for it with my psychic intuition :O) and kurt voneguhts slaughterhouse five for 80 cents. One time they had a huge horror dvd collection and a bunch of ed wood stuff though. Mostly i go to good will for like plates and pans and stuff.
One time i found a cool shirt for my girlfriend at good will though :O
I've gotten two of my favorite shirts from salvation army :O