I never realized how many different companies produced filament for 3d printers. There are literally hundreds fdm filament providers out there. With all the competition you would think that prices would come down. I was reading somewhere that it only costs about $2-$3 in raw material plastic pellets to create a one gram spool of filament. Sure there are fixed costs, but these should easily be able to get diluted down as production heats up. Here is a list of all the known filament suppliers out there. Most provide both PLA and ABS:


http://reprap.org/wiki/Printing_Material_Suppliers


I would assume that it's the most complete list out there. Correct me if I'm wrong.