I would purchase the fabric. LQS fabric is good quality fabric, too good of a deal to pass up at 60% off.
As long as it is quality fabric. Sometimes they put bolts of fabric 'on sale' and it is not LQS quality.
With the price of fabric going up I would take advantage of such a great sale.
Be sure to purchase something you would use in your type of quilts. Tone-on-tone,
or for backing fabrics, size of quilts you make will depend on the yardage to purchase.