Selling Gem & Gemology back issues

I have complete sets of 1989, 1990, 1992 and 3 issues of 1995, 2
issues of 1996 totaling 17 issues in all of Gem & Gemology Magazines
from G.I.A. I need to liquidate and am hoping for advise or a buyer.
The magazines are all in excellent condition. I checked G.I.A.'s
web site and they are charging $40 for complete sets and $12 for
individual back issues. 4 of the issues I have are no longer
available through G.I.A.

Any leads or advise on liquidating my collection would be
appreciated. Thank you in advance, Gisela G.G. Jewelry & Gifts