Check out AAVP-7A1 Assault Amphibious Vehicle 3D model on CGTrader for $119. High-quality Subdivision ready mesh by MrFrezzy: 859561 polys, 874800 vertices.
OBJ (OBJ, filesize: 18.8 MB), 3DS (3D Studio, filesize: 1.51 MB), MAX (Autodesk 3ds Max, filesize: 142 MB), BLEND (Blender, filesize: 13.1 MB), C4D (Cinema 4D, filesize: 10.6 MB), FBX (Autodesk FBX, filesize: 35.1 MB), MA (Autodesk Maya, filesize: 23.8 MB), MEL (Maya Mel Script, filesize: 23.8 MB)