Here are the many items I have for sale and the price next to them.

Items:
Acid Force 5000
Acid Relax SOLD
Amethyst Force 7000
Amethyst Relax 7000
Aqua Blood SOLD
Aqua Force SOLD
Aqua Relax 500
Aqua Torso 1000
Bronze Force 800
Bronze Relax SOLD
Bronze Torso 1700
Chronos Blood 1200
Chronos Force 500
Chronos Relax 500
Chronos Torso 1200
Dragon Blood 20000
Dragon Force SOLD
Dragon Torso SOLD
Gaia Force 2500
Gaia Relax 2500
Gladiator Blood 3000
Gladiator Force 1500
Gladiator Relax 1500
Gold Force 1300
Gold Relax SOLD
Marine Blood 700
Marine Force SOLD
Marine Relax 500
Marine Torso 700
Noxious Force 7500
Noxious Relax 7500
Orc Blood 2000
Orc Force 700
Orc Relax SOLD
Orc Torso 1400
Quicksilver Torso 25000
Radioactive Blood 1500
Radioactive Force 700
Radioactive Relax SOLD
Radioactive Torso 1500
Sapphire Blood SOLD
Toxic Relax 18000
Vampire Force SOLD
Vampire Relax SOLD

Edit: These joints can now be found in the Trade Center for the same price.