There are many types of unique named weapons in the game Fallout 76:
◾Skyline Valley: Anchorage Ace, Ticket to Revenge, Shattered Grounds, V63-BERTHA, V63-OLGA, V63-HELGA, Red Terror, V63 Zweihaender, V63 Shock Baton
◾Mutation Invasion: The Peacemaker, Overkill, Boomstick, Longshot
◾Nuka-World on Tour: Love Tap, Molerat Bat, Gunther's Big Iron, Western Spirit, Burning Love, Grand Finale, Whacker Smacker
◾Once in a Blue Moon: Holy Fire, Elder's Mark, The Kabloom, Ogua gauntlet, Cultist Piercer, Luca's switchblade, Blue Ridge branding iron, Cryptid jawbone knife
◾Test Your Metal: Foundation's Vengeance, Pirate Punch, Doctor's Orders, Tone Death, Crowd Control, The Debilitator
◾Wastelanders: Final Word, The V.A.T.S. Unknown, Brotherhood recon rifle
◾Wild Appalachia: Sole Survivor
◾Voice of Set, Blade of Bastet, Civil Unrest, Perfect Storm, Fancy pump action shotgun

The seller will send a request to friends in the game. As soon as you accept the invitation, the seller will move into your world and meet with your character.
The order is executed immediately if the seller replied to you in the chat or within a maximum of 24 hours.