The only way you can tell this Deering is used is by noticing the very light wear to frets near the nut. It's difficult to play a banjo much without giving the surface of the head at least a little scuffing with fingers of your right hand. This example shows almost none of that, making us wonder if the player wore gloves on their right hand? (but seriously, they were probably adept at playing with their right hand suspended above the strings rather than anchoring their pinkie on the head).
The Sierra model has Deering's complete "tone package," meaning a 3-ply violin-grade maple rim, bell bronze tone ring, and cast resonator flange. The difference between this Sierra and higher models is fancier wood, more inlay, and a time-consuming glossy finish. But if solid bluegrass tone is what you're after, this Sierra has all the necessary ingredients.
Original case is equally clean