Looking for Old Computers

I am interested in getting my hands on a Apple ][ and/or Macintosh 128/512 and/or Macintosh Portable. I do not have an abundance of money so if anyone is willing to part with any of the computers for free or at a reasonable price or happen to know of a place where I can acquire one at a reasonable price that would be great. Please email me with information at macaddict777@yahoo.com or post. Thanks