Philadelphia Low-poly (Polygon mesh 3D model) is available on CGTrader for $299. Original author: 3D-City-Projects. Specs: 1 polys, 1 verts.
OBJ (OBJ, filesize: 30.2 MB), FBX (Autodesk FBX, filesize: 87 MB), MAX (Autodesk 3ds Max, filesize: 210 MB), DAE (Collada, filesize: 79.2 MB)