Natural pearls are priceless...and more so when they happen to have such a pedigree. Now, saleables SHOULD be priced!
We are jewellers, merchants. A top jewellery shop owner depends on his many costumers from the "good society". Thus, in case I would sell such a AAA item to Mrs. So-and-so, I should expect to have Mrs. Sa-and-sa visiting me the day after (perhaps the week after) Mrs. So-and-so wears the famous necklace at a party. Mrs. Sa-and-sa needs of course in.medi.ate.ly an antidote for the excruciating pain caused by her beloved enemy show. If I were unable to do it --which would be the case-- I wouldn't probably never see Mrs. Sa-and-sa again at my shop. And if I WERE able to make Mrs. Sa-and-sa (god forbid!) happy, THEN I may lose both of them.