The brick and mortar I got my ring at has an upgrade policy of applying 100% of original ring to a new one, with $15k minimum increase. Anyone have experience trying to negotiate this $15k down? We got our wedding bands from them too, so I'm hoping they feel like they made enough money from us to drop it to say, $10k minimum increase? 
In terms of details, we're looking to go from 1.35ct to 1.8-1.9ct ish. We're probably ok with a lower color+clarity grading as long as the cut good enough, so I'm hoping won't have to drop 15k on the upgrade.

In terms of details, we're looking to go from 1.35ct to 1.8-1.9ct ish. We're probably ok with a lower color+clarity grading as long as the cut good enough, so I'm hoping won't have to drop 15k on the upgrade.