Check out the assets bundles at this link.
Get your open world game project up and running at record pace with this comprehensive bundle of assets for Unreal Engine! Regardless of where your project is in development, you’ll get the building blocks you need to make your vision real, including 3D models for characters, environments, props, and vehicles, high quality mocap animation sets, royalty-free music collections, and more! Pay what you want for this massive collection of assets that span the genres, valued at over $2,500, and help support charity with your purchase.
You can always check out the most recent Humble Bundle offers here and here.