Check out Russian Soviet biplane Polikarpov Po-2 Kukuruznik Low-poly 3D model on CGTrader for $139. High-quality mesh by OlegShuldiakov: 12000 polys, 8000 vertices. Textured, UV Mapped.
OBJ (OBJ, filesize: 13.9 MB), OTHER (Other, filesize: 13 MB), FBX (Autodesk FBX, filesize: 15.2 MB), MAX (Autodesk 3ds Max, filesize: 14.3 MB)