I just bought a used Mac off ebay, tossed a SSD in it and threw 10 gig of ram into it as well, the SOB hauls for under $600.
Word of advice stay away from Yosemite OS X, i recommend torrenting Snow Leopard, Mountain Lion, or Mavericks
Word of advice stay away from Yosemite OS X, i recommend torrenting Snow Leopard, Mountain Lion, or Mavericks