One can purchase a CVA muzzleloader from the official website of CVA. These hunting equipment costs between 100-600 dollars and comes in numerous specifications.
1:28
You need to seek the services of a good gunsmith.
Around $250 to $450 dollars, depending on where you shop. This website has all the CVA Optima V2 rifles in stock www.muzzle-loaders.com
It's on the barrel under the forend. You'll have to remove the forend.
For the CVA Eclipse Hunter .50 caliber muzzleloader, you typically use 209 primers. As for the propellant, popular choices include Blackhorn 209 or other muzzleloader-specific powders like Pyrodex or Triple Seven. Always refer to the manufacturer's guidelines for specific recommendations and safe loading practices.
Cabela's or Dixie Gun Works would be your best bet, or gunborker website.
"Best" is a subjective term that depends, among other things, on your skills, intended use, pocketbook, "feel" of the weapon, etc..
A CVA Revolver with the serial number b52937 could be worth anything. But with your discription it is hard to put a price on it. How much it is worth depends on the condition it is in. It could range from nothing to a couple thousand.
50-500
50-350
50-200