Vintage (40 years) 14K/diamond ring

14K Yellow Gold ring with 3 diamonds.
Appraisal with picture from May 30, 1987.
Ring was bought from Spiegel (also picture of ring from catalog page) approx 1985. Almost 40 years old.
Bought from sale catalog for $99 plus tax.
Appraisal almost 40 years ago has it at $100.
Described as 14K yellow/gold ring with three .01ct single cut diamonds.
This ring has more than tripled in value. Shows no wear.
5 1/2 to 6 in size.
If I dont sell on site, I will sell at jewelry auction.
EUC