ThemeIsle WordPress Themes
Each of them has a lifetime plan and a yearly plan. The lifetime plan cost USD$199 for 1 website except for Neve Pro (Business Plan) which is for unlimited sites.
And because you are a visitor/subscriber of my site, my daddy can install the selected theme on your website for a discounted price of USD$99 (lifetime plan) each. That is 50% off!
Now, more about lifetime plan and licenses. Lifetime plan is based on the lifetime of the product, in this case – the theme itself. Should the developer decide to no longer update the theme, there will not longer be any updates, but the theme is still functional until future WordPress updates render it incompatible.