first step is to take the quilt to a quilt historian and find out what kind of value it has- and what they recommend- some quilts are better off being repaired-others should be left alone-
and just because a quilt is old it may not be considered a valuable quilt-except to you- age does not automatically make value. some things are valuable to us because of a personal connection- but have no real market value-
once you find out just where the value lies with your (heirloom) you can determine if restoration is in order.