Hello,
HikaSerial Subscription allows to sell subscription products with HikaShop.
So what you're talking about is a product listing ; afterwards, the fact that you're buying a "subscription product" will create a subscription which can be pay with a recurring payment method.
Afterwards, once customer have a subscription, it will unlock a user group (so you can do things thanks to Joomla ACL) or it can also unlock downloadable files via the subscription plan.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.