For those of you that like high quality affordable extruders, the Goliat extruder from Tytan 3D may be the answer. While they have been selling their extruders for a couple month already, next week they plan to launch an Indiegogo campaign for the Goliat extruder. A fully aluminum extruder that will cost just $49. More details on this extruder at http://3dprint.com/10286/tytan-3d-goliat-extruder/