Check out Convention Center Low-poly 3D model on CGTrader for $129. High-quality mesh by memar-allahyarov: 31836 polys, 24490 vertices. Textured, UV Mapped.
MAX (Autodesk 3ds Max, filesize: 25 MB), FBX (Autodesk FBX, filesize: 4.94 MB), PNG (PNG, filesize: 25 MB), 3DS (3D Studio, filesize: 653 KB)