These cheats can be purchased for the indicated price. Nice!

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

Visual Modes
Night Vision Mode: 8,000.
Sketch Mode: 10,000.

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

The rest
Instant Nano Forge: 10,000.
Super Melee: 8,000.