Pricing RB copper

Merc

How do you price RB copper? Full red goes for the most. Then there are the red-brown coins. PCGS defines red-brown copper as having 5 to 95% origional red. Some are almost red with just a slight mellowing. There is no brown, but it is not the bright orange of a full red coin. Others are half red and half brown. Some have just a touch of red remaining. Then there are the few RB coins with great toning. How do you price these coins?

95% red
50% red
10% red
50% red with great violet toning

nwcs

I price them in accordance with their luster, color, and flash. I'll usually start with a BN price and then work my way up mentally with the attractiveness of the coin. If it's spectacular, then I don't worry about the designation and I find a price that I'm willing to pay that isn't overpaying.