if you type long-arm quilters into the search box it will get you to the list of long-armer's on the board,
some have regular price lists, some charge by the square inch; some provide batting, some - you send your batting.
you always pay for shipping AND INSURANCE! i try to use flat rate boxes and insurance is not expensive.
different quilters have different (styles) you should look at the pictures (or the real thing) and see the type of quilting each one does and choose a quilter who quilts the way you like and charges what you can afford. when you contact a long-arm quilter about services she/he will go over their policies, turn around time, prices, and how they would like your top prepared (nicely squared, loose threads removed, pressed--backing larger than the top, pressed, square)
try to find someone in your area that way you can visit, see their work first hand and talk about what you want on your quilt.