Check out 40ft Shipping Container - MOL 3D model on CGTrader for $35. High-quality mesh by Panaristi: 56827 polys, 39558 vertices. Textured, UV Mapped.
OBJ (OBJ, filesize: 25.9 MB), 3DS (3D Studio, filesize: 12.4 MB), LWO (Lightwave, filesize: 13.1 MB), C4D (Cinema 4D, filesize: 12.7 MB), FBX (Autodesk FBX, filesize: 24.9 MB)