Damaged 1905 L&C gold comm $1 value
I’m curious how to assess the grade/value of a coin. I’m looking at a nice AU example of a 1905 L&C gold comm dollar that has been made into a stick pin. The obverse (date side) has a slight scratch and the reverse has a small drop of solder to hold the stick pin. It’s worth $450-600 without the solder and pin, but how do you discount for the damage?
The person selling it to me is very reputable, I’m just curious how you discount for this sort of damage 30%, 50%? Is there a guide or do I just trust the dealer (who’s never done me wrong)