SO this is difficult to say...., because the question will mix "kits" (which vary a lot) with finished rifles and guns, AND with factory produced items.... plus for some there may be a price-point that puts some options out of reach.
Finally, what is one going to do with their flintlock? IF one is strictly doing targets, that's different than hunting small game, which is different than also hunting large game, which is different than small game, birds, and big game....,
I'm going to leave "used" guns that are "out of production" out of this equation, because they greatly vary in price and condition... too much to write "these are as a rule a good value".
So IF one has the skills, and the budget, the Kibler kit is an excellent choice. No question!
IF one does not have the skills, or the budget, then the Pedersoli
Frontier in .54 flintlock is an excellent choice for an out-of-the-box rifle for Big game and targets.... it also comes in .50 and is currently, reasonably priced. Lyman rifles tend to be a good value too, and the Lyman
Trade Rifle in .50 or .54 is slightly less expensive than the Pedersoli
Frontier.
If one does not have the skills, and also wants to hunt small game and birds, then the Pedersoli
Indian Trade Musket is probably the best value, as it's a smoothbore but will also shoot .610 round ball. That being said, IF one has some basic skill with wood finishing, AND wants to hunt birds, small game, and big game, then the Pedersoli
Indian Trade Musket KIT, is the best value out there.
IF one is simply looking to shoot blanks while at a historic reenactment, and beat the heck out of it, then a
1st Model 1756 Bess, with matching bayonet, from Loyalist Arms LLC, is in my opinion the best choice for the money.
IF you want something that looks like you went back in time, and grabbed a relic before it got old, and brought it back to shoot and to display..., then you want to contact Dave Person (
@dave_person ) and have him build a Bess or a fusil or something for you.
IF you wanted to hunt with a flintlock handgun, AND wanted something really different..., and don't most of us "dare to be different" ?...., then in that case you want a Pedersoli
Bounty Hunter Flintlock Pistol (it has a 16" barrel ) , and what the heck, have a stock maker fit it for a removeable shoulder stock....., while at the same time have the barrel reamed out as a smoothbore for shot...., It's a pistol so you're going to be "right on top" of the deer anyway, and as a smoothie it will give you small game and maybe some upland birds...
LD