I've seen antiques sell on these boards for 400M and I've personally sold several for over 100M.
99% of Major and Legendary jewels are going to be dropping with the Antique property.
Plus, people are finding out that antique if properly cared for can last quite some time.
The question determining the value is how much the ring or bracelet augment someone's template and suit.
Sorry, I can't appraise it but I'm tired of people saying items (jewels) are worthless because of the antique property...that's just not the case.