Independance Ironstone Interpace Japan 1776

I have inherited my grandmother's china set, which consists of white Independance Ironstone Interpace Japan 1776.  The set has 131 pieces, in good condition, with only one or two pieces having a small chip.  There are:

13 dinner plates, 12 salad plates, 12 soup bowls, 19 sm plates, 12 sm bowls, 10 condiment dishes, 16 cups with 18 plates, 2 creamer, 2 sugar bowls with lids, 1 coffee pot with lid, 1 tea pot with lid, 2 butter dishes, 2 salt shakers, 2 pepper shakers/grinders, 1 large serving bowl with lid, 1 small serving bowl with lid, 1 partitioned serving bowl, 1 medium serving bowl, 1 large serving platter, and 1 extra large serving platter.

I would appreciate any feedback as to what this set would be worth.