18” pearl necklace

My grandfather bought this for me when I was 10 I’m now 28 it’s been kept put up in my jewelry box all these years still has the original tag on it. He paid $125 for it I have posted a screenshot of the same necklace from the same store just with today’s pricing...$100 difference. Now unfortunately I’m in a bad situation and need the money desperately. So asking $200 for it please serious inquiries only