Good parts or Junk? Opinions needed

I have these salvaged parts, some images are at these pages. I need
opinions on what good they may be for CNC homebuilt gear or robotics.
http://personal.lig.bellsouth.net/lig/e/s/esccmail/dc1/dcdrive.html
http://personal.lig.bellsouth.net/lig/e/s/esccmail/bldc/bldc.html
http://personal.lig.bellsouth.net/lig/e/s/esccmail/kewltech/ct.html
http://personal.lig.bellsouth.net/lig/e/s/esccmail/parts/motors1.html
http://personal.lig.bellsouth.net/lig/e/s/esccmail/parts/sensors1.html
Robert Ash
esccmail at bellsouth dot net