No. OrDomain WHMCS Template also have domain selling option. This is because, domain selling is a default option of WHMCS system.
Moreover, we just provided support by customizing WHMCS default header, footer and color based on our theme. That means, all functions/options are same as WHMCS default template except our customized header, footer and color.
By the way, the interssl.com fully customized the WHMCS template based on their needs.
So, if you want a custom WHMCS template like interssl.com, then you need to hire someone else to customize the WHMCS template for your based on your requirements.
Hope you understand.
Best Regards,
ThemeLooks Support Team