Etsy seller Frances Rose from England has lots of affordable pillows in fabrics by Klippan and Marimekko. I love this Klippan design below called Candy with all the yummy goodies on it (Hurry, she only has 5 left!).
I've added a few more favorite pillows from other sellers on my etsy ticker (left column) today, so click on over to see more shops that offer you a quick way to freshen up your space without dropping a ton of cash.
(images from frances rose)