none wrote:
When you mail the package at the post office, the clerk will ask you to
fill out a duty form declaring the contents and value of the package. It
takes all of five seconds to fill out -- no longer than the insurance
form. That's all there is to it.

Just in case you don't know how to declare the contents: in this case
you would write "Used bicycle parts". The quantity is one and the value
is the sale price.

-Mike