Howdy
If you want a Sharps, this is the model that I bought:
https://www.dixiegunworks.com/index/page/product/product_id/8340/category_id/314/product_name/CR0415+PEDERSOLI+SHARPS+M1874+SILHOUETTE+RIFLE,+.45-70
There are a few reasons I went with this model.
First of all, I wanted a 'shotgun' style butt plate, not a crescent shaped butt plate. I have enough experience with crescent shaped butt plates to know that if you mount it to your shoulder incorrectly, with the points of the crescent in contact with the meaty part of the shoulder, it is gonna hurt like the dickens when you fire it as recoil drives the points into the your flesh. I know how to mount a crescent shaped butt plate correctly, hiked out a little bit further on the arm, with the points of the crescent encircling the shoulder joint, but shooting from the bench that can be awkward.
Second I wanted one chambered for 45-70. A lot of guys want a 45-110 or 45-120, but if you are shooting Smokeless there is no advantage to the larger case, you can get all the powder needed in the shorter 45-70 case. Plus, there is more available for 45-70 as far as brass, dies, and written advice than for any of the other 'more esoteric' cartridges such as .50-90 or many of the other cartridges the Sharps was chambered for. For your first Sharps, or Trap Door for that matter, stick with 45-70.
This model is very plain jane. I chose it because on inspection of some of the fancier models I was disappointed with the execution of some of the details such as the checkering and the forend cap. A proper fore end cap should be cast in place on the fore end and shaped to match the wood. Most of the imports pin the forend cap in place, and from what I could see, it was not always done very well.
So this model is exactly what I was looking for, plane jane, 45-70, pistol grip, and double set triggers, 30" octagon barrel. This is gonna hurt, but when I bought this model a whole bunch of years ago it was on sale for $800. A lot of the stuff at Dixie goes on sale periodically, so it is good to check back often and see if something is on sale.
This is the tang sight I put on my Sharps:
https://www.dixiegunworks.com/index/page/product/product_id/1691
You can spend a couple of hundred on a good tang sight, but this was good enough for me to start with.
Black Powder? Well duh, this is the BP forum isn't it? My Sharps has never had anything but Black Powder fired in it, except the proof loads at the factory. I like a 405 grain .458 diameter lead bullet.
That is one of my 45-70 rounds on the far right in this photo, which is also the same round I shoot in my Trap Door.
If you buy a short carbine style Sharps you are going to want to cut down on the powder. The Trap Door 45-70 Carbine load only had about 55 grains of powder in it, along with some cardboard wadding to take up the extra space, because 70 grains of powder produced a pretty brutal recoil in a light carbine. (Hint: NEVER allow air space in a Black Powder cartridge. If you are going to reduce the charge, you MUST fill up the extra space with something. The Government 45-70 carbine loads used cardboard wadding)