Check out TRIPLE WHEEL STAIR CLIMBING WHEELBARROW STEP BARROW CART TROLLEY 3D model on CGTrader for $22. High-quality mesh by SURF3D: 183458 polys, 146932 vertices.
STL (Stereolithography, filesize: 8.75 MB), OBJ (OBJ, filesize: 16.9 MB), 3DM (Rhinoceros 3D, filesize: 28.6 MB), DAE (Collada, filesize: 29.4 MB), 3DS (3D Studio, filesize: 5.27 MB), FBX (Autodesk FBX, filesize: 5.98 MB), SAT (3D ACIS, filesize: 29.1 MB), DWG (AutoCAD, filesize: 12.2 MB), MAX (Autodesk 3ds Max, filesize: 45.2 MB), IGE (IGES, filesize: 36 MB), BLEND (Blender, filesize: 16.4 MB), GLTF (glTF, filesize: 5.59 MB), STP (STEP, filesize: 24.1 MB), SKP (Sketchup, filesize: 20.4 MB)