John Deere 544G (Polygon mesh 3D model) is available on CGTrader for $139. Original author: Polygate2. Specs: 553569 polys, 567131 verts.
OBJ (OBJ, filesize: 18.4 MB), MAX (Autodesk 3ds Max, filesize: 104 MB), MA (Autodesk Maya, filesize: 36.4 MB), MEL (Maya Mel Script, filesize: 36.4 MB), C4D (Cinema 4D, filesize: 16.2 MB), 3DS (3D Studio, filesize: 18.9 MB), FBX (Autodesk FBX, filesize: 29.6 MB), BLEND (Blender, filesize: 25.8 MB)