It so happens that I live in Canada and have a chum whose great great uncle went out to the Klondike gold rush. Once I decide on a fair price, you are right, there may be some local interest.
Well there ya go Ronald. Who knew?
If your friend is a GOOD friend, perhaps your pricing might reflect that. Factor in inflation based on what you paid years back, see what kinda value that is (I haven't a clue about such things) and talk it up with him. Might find a buyer. OR if you're really good at sales pitch and closing the deal, make a buyer outta him (or others) for his families sake.
Or maybe he has something to trade or throw in to boot?