76 First Day Covers, Postmarked Around The Globe, Commemorating The Coronation Of Queen Elizabeth II

My dad loved stamps.
From his collection, I am holding a collection of 76 first day covers commemorating the Coronation of Queen Elizabeth II, postmarked from over 60 possessions of the British Empire.
The postmarks seem to include most every possession of the empire Empire in 1953. They range from London to Canada to Hong Kong to New Zealand to the Falkland Islands to Jamaica to the Solomon Island and many many others. .
The envelopes are all addressed to the same office in London.
The envelopes are held in a binder and are protected by plastic sleeves, two envelopes per sleeve.
With the passing of her Majesty, I imagine the value of the collection might be at its peak.
I am hoping that the knowledge base of this form might provide some advice as to how to have the collection appraised and possibly sold for fair and honest value.
Thank you in advance.

Your covers seem to have an asking price of anywhere between $10-$15 each on the low side to 20 Pounds each at the site linked below. You can find them on Ebay and Hipstamp if you would like to establish some values for yourself. You could sell them one at a time or sell the whole lot at once perhaps as an auction lot. Much less work to sell the entire lot. Don't expect to get 76 x 20 Pounds though. An appraisal IMHO seems a bit of overkill. They are not uncommon.

https://www.buckinghamcovers.com/sh...C&shownum=48