Is this the one you are looking at
Surgeon1? It has been on GB for a few months...
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For almost the same money, there is this one, sold by Champlin Firearms, one of the most reputable double rifles dealer in the country...
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Or for a little more money, there is this one...
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Or if you really want a Rigby...
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Truth be told, if I were looking for a '
hunting rifle' (I personally shoot a Krieghoff .470, which is a 'hunting rifle' albeit a very, very good one), I would look at this one very, very hard...
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The bottom line is that you can buy a PROVEN double .470 rifle (Heym, Chapuis, Kreighoff, Blaser, if you like their look & engineering - which is remarkable, Verney Carron) backed by a completely trusted dealer and shop (George Caswell & JJ Perodeau of Champlin Arms) for $15,000+
More money ($10,000 to $20,000 more) buys you a historic name on the barrels (Westley Richards, Lang, Cogswell & Harrison, Bland, Francotte, Jeffery, etc.) but not necessarily a better rifle.
A whole lot more money ($30,000 to $100,000 more) buys you one of the legendary names (Holland, Rigby, God forbid Woodward or Purdey) but they will not kill any better and at that stage you want to think real hard before taking a $100,000 double to Africa.
I am not sure where a $22,000 Rogue River / Rigby fits, but I guaranty you that it does not put you in that last category, and I would rather trust a Heym, Chapuis, Kreighoff, Blaser, Verney Carron, or Merkel, etc.) because these people have had for decades a lot more experience putting doubles together than Rogue River had, and double rifles making is a trade in which experience is paramount...
You asked for opinions, this is just mine. It comes with no agenda or ulterior motive, and it is only worth what you paid for it, but it is honest