Do you need royalty-free models for your commercial projects? You can now get any 3D model on the Sketchfab store with a 25% discount with checkout code SPRING19 - valid until April 30. The Sketchfab store contains thousands of .blend files that you can load directly into Blender. In addition, all Store models are also downloadable as glTF, which you can import directly using the glTF importer that's bundled in Blender 2.8 beta.
Here are a few cool examples of Blender models that you can find in the store: