For a blemish free, 12-13mm with that medium to dark golden color and with good luster, a good wholesale price would be below $400 each. Wholesale in the US would be closer to $600 each.
Make certain you know the exact size before bartering. You should always carry a digital caliper and an analog caliper along (incase the battery dies in the digital), when you're shopping for pearls like this. Never rely on someone's thumb.
