Platinum Wheat Fine China Japan

I have my mother's (who is nearly 80) set of Platinum Wheat Fine China.  It was bought in the 1960's with S&H Greenstamps (I think) or was a promo from a grocery store.  She has a full set of 8 that was used for family Holiday's (Easter, Thanksgiving and Christmas) while I was growing up.  She also has a full set for 12 not ever openned and still in the box. There are some serving pieces as well.  I would like to sell the complete set of 19 or 20 ASAP.  I will include the serving pieces with the set.  I live in NC where Replacements is and they are fully stocked and not buying anymore of this line of China.