Our templates can be sold repeatedly to different customers. When you purchase the template at a Regular price it means that other people can buy this template after you do that.
If you purchase the product at a 'Buyout price' it guarantees that you are the last person to buy this template from us. It means that this template may have been sold before a couple of times (see 'Downloads' number in item's properties) but only you and people who bought the template before you will own it. After this kind of purchase the template is being permanently removed from our sales directory and is never available to other customers again.