Hexonet offers backorder services allowing you to enter an auction for domains that are to be released. More details about the backorder service are available here: Domain Name Backorders | HEXONET.
You can also select similar available domains through our control panel.
Also, please check if the preregistered domain you are looking to buy is listed in third party services like https://www.afternic.com/ where you can buy preregistered domain there and then can transfer to us.