It indeed does look like someone trying to get their money back on a new purchase.
The key in your phrase is "practically new firearm". It is not new. Just like when you take a car out from the dealership, you lose a lot of value just because it is no longer the bespoke personal purchase, as a new one is.
That being said, it is from a lesser known maker, not one of the big names. So collectability value will be limited. It is in one of the most common African calibers that exists. Mauser actioned 375 H&H come up for sale all the time. (See
@rookhawk's recent post on the lower cost of purchase for 12ga versus the other gauges in shotguns.)
Some examples to give relief:
Poulin auction May22, Granite Mountain Arms in .585GMW sold for 7500$ (plus fees etc. would make it 11000$ or so)
Granite Mountain Arms in .505 Gibbs, did not sell at 12000$ mininum, despite very fancy gold inlaid engraving
Not a GMA action, but a Win70, but worked on by James Tucker, sold for 4250$ in June 20
Some more specifically on .375H&H
a Holland and Holland rifle sold in May 2022 for 3800£ and it has a case and a scope!
also in May 2022, this far more known maker from South Africa, didn't sell at the minimum of 4400€
A take-down ! from Dumoulin, far better known than James Tucker, sold for 4500€
And I can go on.
So yes, I consider the "value" to be around 4000-6000$, but a shop would probably advertise it around 10000$. I have absolutely nothing against this rifle, just that there are a whole host of alternatives, some even more attractive than it (
that Holland & Holland at 3800£ was a great purchase for the buyer), that sold for well under their 15k$ asking price.
Cheers,
V.