Falcon3D MD-80 CargoMax (Polygon mesh 3D model) is available on CGTrader for $85. Original author: Falcon3D. Specs: 39639 polys, 20696 verts.
STL (Stereolithography, filesize: 651 KB), OBJ (OBJ, filesize: 673 KB), OTHER (Other, filesize: 256 KB), 3DM (Rhinoceros 3D, filesize: 699 KB), 3DS (3D Studio, filesize: 983 KB), DWG (AutoCAD, filesize: 585 KB), DXF (DXF, filesize: 603 KB), MAX (Autodesk 3ds Max, filesize: 340 KB), LWO (Lightwave, filesize: 394 KB), W3D (Shockwave 3D, filesize: 1.42 MB), SKP (Sketchup, filesize: 2.39 MB), TEXTURES (Textures, filesize: 3.17 MB)