Mainz Gladius Roman Sword Low-poly 3D model is available on CGTrader for $29. Original author: stealth4health. Specs: 1334 polys, 700 verts.
OBJ (OBJ, filesize: 455 MB), FBX (Autodesk FBX, filesize: 103 KB), BLEND (Blender, filesize: 638 KB), DAE (Collada, filesize: 177 KB), GLTF (glTF, filesize: 9.18 MB)