26" barrels would be unusual for the 19th Century. The quality of refinishing is remarkable. And it is very unusual to find the markings of US retailer/importer on the barrels. What would be the proper price for this one strikes me as problematic. I thought it exhibited good quality and bid to $2K (with buyer premium) and I was outbid. I don't think "Bentley semi-hammerless" guns are sufficiently well known to have a particular collector following, but I am clearly not the only one who would look at this one and feel inclined to buy it.