With intent of helping any "others" who might have interest, I offer the following view.
C&H brand name has Brand Value three (middle of the range for Brit and Continental brand names); BV3.
Assume it is a middle Original Quality grade, typical of many boxlock Brit guns; OQ6.
Assume the Current Condition of the gun fits the following description, "significent use" (50% original finish, few spots of surface damage, no mechanical faults); CC3.
BV3 - OQ6 - CC3 = $2320.
Reverse engineering the value: BV3 (fixed fact).
Assume one quality grade and one current condition grade lower: BV3 - OQ7 - CC4 = $1233 (CC4 = heavy use but no abuse)
Assume two condition grades lower: BV3 - OQ6 - CC5 = $1336 (CC5 = heavy use with minor repairs needed)
Could be a bargain.