The place to share is your Showcase and you have many different options. 

  1. Simply share the URL of your (or anybody's) Showcase.  If you have a Wish List and/or Gallery you can click on their buttons and then share that URL  -

    The selected section is underlined.

  2. You can use the search and sort to define what to show.  Here for example a user shows his "Freddy Funko" items sorted by highest to lowest Estimated Value  -

  3. Create and then share Lists.  More on than here.  You can also select and change a Spotlight (a List that will show as default if a visitor comes to your Showcase).