It's nice, but I bet it's weight in donuts that it was never any kind of a flintlock - the lock on it now dates from around the 1840's - the style that was new then - and the shape of the wood at the front of the lockplate looks original - no room for a flintlock, uh, lock, pan and frizzen. Also, the captive ramrod is more often than not a feature of a pistol carried by a horseman. The name on the lockplate is most likely the name of the maker of the lockplate - gunmakers' names are more usually found on the top flat of the barrel.
The lack of a skull-bashing grip plate and lanyard ring makes it likely to have been a large-calibre travelling pistol suitable for a horsed gentleman, rather than a martial pistol like that issue to a lancer or dragoon of the day.
It's a nice-looking piece, and is most probably English, but without taking it down to see the proof marks, we'll never know.
Is it a decent price? Like $350 - 500? If so, just nod.