Purchased the following cheats for the corresponding prices:

Unlimited Ammo
Singularity Cannon - 5,000
Pulse Grenade - 5,000
XNG-5000 - 5,000
Nano Rifle - 5,000
Banshees - 5,000
Arc Welder - 5,000
Charge Launcher - 5,000
Plasma Beam/Mr. Toots - 5,000
Plasma Cannon - 5,000
Assault Rifle - 5,000
Rail Driver - 5,000
Rocket Launcher - 5,000
Shotgun - 5,000
Pistols - 5,000

Weapon Unlocks
Napalm Laser - 10,000
Convergence Laser - 8,000
L.E.O. Rocket launcher - 8,000
L.E.O. Machine Gun - 6,000
Lava Barge Turret - 6,000

Visual Modes
Sketch Mode - 10,000
Night Vision Mode - 8,000

Other
Instant Nano Forge - 10,000
Super Melee - 8,000