Some says its rare, so here is quite cheap copy I think?
Last Crusade 3,5" EGA
http://www.ebay.com/itm/Indiana-Jones-and-the-Last-Crusade-The-Graphic-Adventure-3-5-EGA-PC-1989-/201998774428?hash=item2f0810b09c:g:Zy8AAOSwvqlZeK4K
Last Crusade 3,5" EGA
http://www.ebay.com/itm/Indiana-Jones-and-the-Last-Crusade-The-Graphic-Adventure-3-5-EGA-PC-1989-/201998774428?hash=item2f0810b09c:g:Zy8AAOSwvqlZeK4K