$10 Upper Back Machine 3D model by ReyesRicardoM. Available on CGTrader with 27326 polys and 26723 vertices. Check it out on CGHub.
MAX (Autodesk 3ds Max, filesize: 1.7 MB), FBX (Autodesk FBX, filesize: 1.13 MB), STL (Stereolithography, filesize: 1.3 MB)