Check out StuG III - Ausf G - 312 - Mid Production 3D model on CGTrader for $119. High-quality mesh by Panaristi: 854498 polys, 775731 vertices. Textured, UV Mapped.
C4D (Cinema 4D, filesize: 69.2 MB), OBJ (OBJ, filesize: 152 MB), FBX (Autodesk FBX, filesize: 504 MB), FBM (fbm, filesize: 319 MB), 3DS (3D Studio, filesize: 65.4 MB), LWO (Lightwave, filesize: 76.8 MB)