Thingiverse user “MikeyMakesIt” designed this handy “dry dock” for displaying #3DBenchies. Each dry dock can hold 10 3DBenchies and the design is made so they wont slide out the back and adding clips will prevent the same from happening at the front . There´s also a connector that allows you to stack several dry docks on top of each other.
You can check the design and download all the files on “mikeymakesit” page on Thingiverse.