$79 Cessna O-2A Skymaster 3D model by chipbasschao. Available on CGTrader with 42659 polys and 30498 vertices. Check it out on CGHub.
STL (Stereolithography, filesize: 22 MB), OBJ (OBJ, filesize: 22 MB), 3DS (3D Studio, filesize: 22 MB), C4D (Cinema 4D, filesize: 22 MB), DAE (Collada, filesize: 22 MB), FBX (Autodesk FBX, filesize: 22 MB), LWO (Lightwave, filesize: 22 MB)