it depends on the quilter, the size of the quilt, and the type of quilting you want. To me it seems a tad high, but within an acceptable range for a queen size. Most LAQ charge by the square inch, so your quilt would be 10800 square inches. Last I checked, prices were between 1 cent and 3 cents per square inch. Factors at play include:
1. do you supply the thread, is there a separate thread charge, or does the quilting charge absorb the thread cost?
2. how dense is the quilting? (affects the time spent quilting it as well as the amount of thread)
3. what type of quilting are you requesting? Meander, pantograph, or custom? Custom costs the most.