You mean to start machine quilting? (Not piecing.)
Found this website with a little blurb in the last paragraph:
http://www.cmaquilting.com/
Also found this comment:
http://www.quiltingboard.com/t-81237-5.htm
I would think under $600 for the machine.
Keep in mind a 9" throat is fairly limiting for machine quilting. This would be a starter type of setup.