Click on the site addresses for some helpful information.

Kitco, a site giving current and past pricing of precious metals.
http://www.kitco.com/


Ebay, an on line auction site for willing buyers and willing sellers, may give you
a vague non-retail value of a watch or diamond.
http://www.ebay.com/


The United States Post Office site gives mailing options,
with free packaging and or insurance coverage.
http://www.usps.com