I have had an enquiry from someone looking to get a high quality shotgun valued and perhaps to sell.

Who are the best persons, or gun dealers in Australia for valuing and / or selling a HQ shotgun? Melbourne or Vic location preferred. Otherwise NSW or Sydney? If someone else elsewhere please suggest.

The shotgun is reported to be a 1949 H&H Royal Grade 12g in near-new condition.

Without seeing the shotgun, what would be a guesstimate of its value?