$5 Wagon Low-poly 3D model by GrimEdgeStudio. Available on CGTrader with 8184 polys and 8366 vertices. Check it out on CGHub.
OBJ (OBJ, filesize: 867 KB), GLTF (glTF, filesize: 44 MB), OTHER (Other, filesize: 343 MB), FBX (Autodesk FBX, filesize: 609 KB)