I have a yellow diamond that I want to sell. It has a GIA report. I spoke to a dealer and gave them the stone’s GIA report number. We discussed a range of purchase price and then upon bringing the stone in I was told while the stone is the same stone on the GIA report (it’s also laser inscribed) that the color saturation is less in real life that what appears on the GIA certificate photo and that this is a common issue when trying to go off GIA’s photo. Is this a thing or is this dealer trying to roll me?