Bell OH-58B US Army 4 (Polygon mesh 3D model) is available on CGTrader for $89. Original author: Dreamscape. Specs: 38418 polys, 21000 verts.
MAX (Autodesk 3ds Max, filesize: 434 KB), OBJ (OBJ, filesize: 1.32 MB), DWG (AutoCAD, filesize: 667 KB), 3DS (3D Studio, filesize: 295 KB), TEXTURES (Textures, filesize: 3.09 MB), LWO (Lightwave, filesize: 307 KB), DXF (DXF, filesize: 604 KB)