The DEMO version only includes 4 pages:
http://goldmanresearch.com
http://goldmanresearch.com/Lost-user-name.html
http://goldmanresearch.com/Lost-password.html
http://goldmanresearch.com/plan/login_Itemid-68-plan_id-1.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page