Check out Mecha robot 3D model get 3D model on CGTrader for $50. High-quality Polygon mesh mesh by AlexandreF: 601416 polys, 604464 vertices. Rigged, PBR, Textured.
MA (Autodesk Maya, filesize: 31.8 MB), OBJ (OBJ, filesize: 26.9 MB), FBX (Autodesk FBX, filesize: 30.5 MB), MAX (Autodesk 3ds Max, filesize: 35 MB), TEXTURES (Textures, filesize: 6.01 GB), STL (Stereolithography, filesize: 20.7 MB)