PALUNC:

Nowhere near enough data to say. Look, a best H. J. Hussey is a very high quality gun by any standard. If the gun is in high condition with original barrels that have simply been reproved in Birmingham, then it's a desirable best gun and that price could easily be in the ball park. In otherwise same condition but with Birmingham made replacement barrels, it's strictly a shooter and that price likely more than twice what it's worth.

Attempting to sell such a gun or, worse, buying one, without such basic data definitely puts the plow in front of the horse.

"Serious rifles have two barrels, everything else just burns gunpowder."