Check out UFO rigged and animated Low-poly 3D model on CGTrader for $15. High-quality mesh by Odemir: 1686 polys, 2090 vertices. Rigged, Animated, PBR.
OBJ (OBJ, filesize: 1.26 MB), MA (Autodesk Maya, filesize: 42.3 MB), TEXTURES (Textures, filesize: 41.5 MB), MEL (Maya Mel Script, filesize: 41.5 MB), UNITYPACKAGE (Unity 3D, filesize: 32.9 MB), TBSCENE (Marmoset Toolbag, filesize: 743 KB), FBX (Autodesk FBX, filesize: 255 KB)