Hey, everyone! I'm dying to complete this achievement, so if any of you out there have these weapons for sale, feel free to add my gamertag (ShugenZdead) and contact me! 
These are the weapons I currently need. They're only needed for the achievement, so they don't need to be augmented. I am willing to pay millions for these weapons.
Swords
The Swinging Sword
Avo’s Lamentation
Thunderblade
Really Sharp Pair of Scissors
Hammers
Jack’s Hammer
The Tenderiser
Scythe’s Warhammer
Hammer of Wilmageddon
Sorrow’s Fist
Pistols
Dragonstomper .48
Chickenbane
Bloodcraver
The Ice Maiden
Briar’s Blaster
Mirians’s Mutilator
Rifles
Arkwright's Flintlock
Skorm’s Justice
Simmons Shotgun
The Hero’s Companion
Thanks!
These are the weapons I currently need. They're only needed for the achievement, so they don't need to be augmented. I am willing to pay millions for these weapons.
Swords
The Swinging Sword
Thunderblade
Hammers
Jack’s Hammer
Hammer of Wilmageddon
Sorrow’s Fist
Pistols
Dragonstomper .48
Bloodcraver
Rifles
Arkwright's Flintlock
Skorm’s Justice
Simmons Shotgun
Thanks!