Provided you follow all the applicable rules and regualtions, yes.
the state of Missouri does not require handgun registration.
.22 handgun
The gun and a receipt from the dealer.
That depends on your states laws. Some states allow it; some states require all handgun purchases to be made through an FFL dealer.
You may sell it to a dealer, have a dealer sell it for you, or you may sell it directly to another resident of Arkansas so long as they are old enough to buy a handgun, and you do not have reason to believe the buyer is not able to legally own a gun. If the gun is being sold to someone in another state, the gun must be sent TO a gun dealer in that state.
100-300 or so depending on specifics
I can't stress it more: sell the normal handgun. You get more for the Punisher, but you'll be thankful you kept it. In every game I have played on RE4, I have kept the Punisher throughout the story. It's much more powerful.
For sale ads, gunshops, gunshows, e-gunparts.com
Anyone 18 or older can purchase a firearm in Texas (from a private seller). Only licensed dealers can not sell a handgun or handgun ammo to someone under 21.
Rifle or shotgun, yes, if they appear in person at the shop. Handgun- no.
Sell a cow like we do here in Seymour Mo
If both parties reside in Florida, you can just sell the gun to the other person with no paperwork required. One of the stipulations is, by federal law, you have to reasonably believe the buyer is not prohibited from owning a handgun.