This example sold at auction just this November past. I can't imagine one could ever be found in better condition. I also can't see another fetching this sort of price: Excellent Harrington & Richardson Trapper Model Revolver
This example is intriguing for the nonstandard grips. The holster is also interesting. From the markings on its back, it's clearly not a "one off" but a model of some commercial maker, although just who is an unknown.
Another auction, posting here on account of the very nice photo gallery accompanying the listing which affords a chance for anybody who hasn't handled one of these to get a really good virtual look at one. I'd also remark that the hammer price was quite low for one in this nice condition: Lot 81 – Harrington & Richardson Trapper Revolver .22 RF – Brand Used Works
Note the fancy non-factory grips. Not all the original photos were archived with the completed listing, so I'm including below a close up shot of the modified (replaced) front sight as well.