Under Fire! Map Maker for Commodore 64/128, published by Avalon Hill.  An expansion pack that lets you create your own maps.  Requires the original game to use.  New and sealed, though it's a little bent and misshapen from years in the shrinkwrap.  (It's a thin, flat folder package, not the standard Avalon Hill large box.)

This will be mailed in a cardboard box.