They were not expensive. Spoonflower offers swatches (6x8 inches) for $5 each. I signed on yesterday to order fat quarter sized panels for pillowcases(I've never made them before) that some suggested. The fat quarters were on sale for $4.84!!! BTW, I also ordered custom made fabric from Adult Coloring pages that I created while recovering from knee surgery. Awesome!
Here's a pic of one custom ordered color-page fabric that I used to backed a quilt.