Can I legall sell this? Please help

[iBizStart]

I am interested in opening a site similar to:
www.swordsonline.com
www.amazingweapons.com

What if someone buys a collectible sword and kills his neighbor. Can I get sued because I provided the weapon.

Swordsonline has this statement:
Welcome to SWORDSONLINE.COM
Please read the important information below.
SWORDSONLINE.COM (TM), its employees nor associated companies assumes no responsibility for injury, damage or loss incurred by use of any merchandise sold on this site or in our catalogs.
Full compliance to local, state, federal and international laws and/or statutes is the responsibility of the purchaser.
Weapons, replica or live steel, will not be sold to individuals under the age of 18 without permission or consent of a parent or guardian.
Purchase of merchandise from SWORDSONLINE.COM implies agreement to the above statements by purchaser.
By clicking OK below you agree to the terms and conditions of the SwordsOnline.com website and affirm you are under no legal disability

Will this help. Can I sell this stuff?