From the Hongkiat article:
3D models represent a 3D object using a collection of points in 3D space, connected by various geometric entities. A free 3D model definitely can save your budget and deadline. On average, a modeler saves over 2 hours of modeling time when they could get a free 3D model.
We understand how useful a 3D model could be. Thus, we've crawled into Internet and search for free 3D models which are available for download. Here are as much as 60 websites to download Free 3D Models. Full list after jump!
Note: Some of these 3D models have limited rights. That means they are not allowed for commercial usage. We urge that you check the rights before using them for business purposes.
Thanks to Andrew for the article suggestion!