Where can I get Cheap ONE COLOR area rugs?

Where can I get Cheap ONE COLOR area rugs?
I am trying to turn an unfinished room into somewhere I can hang out, Right now it looks like an attic. The floor Is 56 square meters/600 sq ft. I am on a very tight budget so im looking for the cheapest thing I can find. At Home Depot they have area rugs about 1.5m by 2.5m at $19 a piece, but I know there are larger one color area rugs that are a better value (I have a 2.36m x 3.04m rug from a long time ago) Where can I get this type of rug?

Please suggest a cheaper way of carpeting If you know of one!
P.S. I dont care If the carpet isnt nice carpet AND the area rugs have to be one color, I am going to be laying down many so it fills the 600 sq ft room
I have looked and they are all expensive rugs with designs on them, I need cheap with one color.
I cant find any one color rugs at walmart or ikea!!!