The DEMO version only includes 4 pages:
http://coomb.jp
http://coomb.jp/ap/s/s_rows-40-fq-scls-n_sale-sort-fsdt-desc-rk-desc-pi3-341404.html
http://coomb.jp/info/pi3-341483.html
http://coomb.jp/ap/mag.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.
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