Check out city passenger bus 3D model on CGTrader for $4. High-quality mesh by AlexMas1981: 8486 polys, 8058 vertices.
STL (Stereolithography, filesize: 768 KB), OBJ (OBJ, filesize: 872 KB), FBX (Autodesk FBX, filesize: 572 KB), 3DS (3D Studio, filesize: 386 KB)