First off, BUY ON SALE.
The Blower Thrower: Field Medic version of the flamethrower, leaves behind patches that damage enemies, no healing
capabilities
The Seal Squeal Harpoon Gun: Magazine loaded harpoon gun, go for headshots, decent Demolitionist weapon
Seeker 6: Gimmick weapon, high price, low damage, homing missiles, worst weapon in the whole game
Zed Gun Mk.II: One of only two weapons that fall into the no perk category, SMG, can slow down enemies