Not exactly a Long Rifle, but I did get a 3-1/2" barrel underhammer pistol & there was apparently only one other bidder. So yes, the price was low. Supposed to be a pill-lock which would make it rather early in the percussion period. I do not, however, know how to tell the difference between a pill-lock & one of those that used an inside-out percussion cap. That is, a cap w the priming on the outside, which cap was stuck on the nose of the hammer.
Remember, Guys, Beauty is in the Eyeball of the Beholder!