For two of the quilts I had a friend of my sister quilt them. She does longarm out of her house and offered 1/2 price for the first quilt. Another quilter I used charged about $16 to $17 per square yard. (To calculate square yards: inch width__x inch length__divide by 1296=__square yards.)
At the end, longarm quilting has cost me approximately $80 - $100 per quilt. Maybe some day I will be able to do this myself or have the patience to hand quilt.