As explained in the FAQs, diamond and jewelry buyers often ask you send your items to them before you receive a final amount. This will invariably lead to a lower offer once your item is in the buyer’s possession.  For the majority of GIA certified diamonds, you should get an accurate quote before you ship your diamond or jewelry.  We often recommend asking for a non-refundable deposit guaranteeing the buyer pays the quoted amount (or lose the deposit) before sending your diamond.