Check out Rock Set 18 Low-poly 3D model on CGTrader for $12. High-quality mesh by GizemDilaraTek: 762 polys, 383 vertices. PBR, Textured, UV Mapped.
OBJ (OBJ, filesize: 78.9 MB), FBX (Autodesk FBX, filesize: 39.5 MB), BLEND (Blender, filesize: 39.5 MB)