Still not enough info for a reasonable response. Post the full S/N so that someone can check configuration in the serialization book. Post barrel type (marked on the ribs), length, chokes, chambers, stock and butt configuration (pads decrease value unless original to the gun), and whether each barrel has its own forend. Originality refers not only to the configuration but to the state of the finishes on the gun. Are there any accessories in the case? Are the accessories original Parker? Value could be from a few hundred to tens of thousands.
"Very fine condition" is pretty subjective. Pics help a lot.