No, and if they do, they're stealing from you. Go somewhere else - and report them to the IDOR.
He said sales tax on the firearm, and if you ask the Indiana tax people, you are supposed to pay state sales tax on an internet purchase. If the transfer dealer does not collect it you are supposed to report it on your state income tax form. Most dealers just don't collect tax on the internet sale, so it is up to you the buyer to report it and pay it.
No, and if they do, they're stealing from you. Go somewhere else - and report them to the IDOR.