She's a beauty.
I stopped buying Grey Sheets a while ago. As we all know, price guides are just that: guides.
I would always check eBay "sold" listings to get the best idea of current pricing. Be sure you use eBay's "advanced search" feature to find auction prices actually realized. Never use eBay pricing unless the item has sold, and bid on by more than one buyer.
There is a mammoth collector base on eBay. "Sold" prices always reflect actual fair market value.
Here is an example for your coin: