The most expensive fabric I have purchased for my quilting I paid around $15.00 a yard for the backing and center pieces of a DBL WR quilt I made for my DD. However the most expensive fabric I have ever used for in a quilt was for a quilt that a very dear elderly friend (now deceased) commissioned me to make. She wanted a king size quilt with a Pima cotton sheet for the backing. Her niece, my dearest friend ordered the sheets on line I ended up needing two flats. Each sheet cost $80.00 plus tax. I made her QAYG quilt that I designed and she was thrilled. She used the front side with roses on her bed in the spring and summer and the solid sea foam green in the fall and winter. Her niece now owns the quilt. I think the hardest thing I have ever done in my quilting career was cutting into that $80.00 sheet, I as terrified I would mess it up. Thank goodness I didn't. I fussy cut each rose section for the front. A picture of this quilt is listed in the picture section as "Hope's Rose Garden"