Yes, the current version of SVN supports Sublime Text 3!
Currently I use Stripe for checkout via this site to provide a secure way for you to purchase the packages without your credit card data ever touching my server. Unfortunately their addresses verification doesn't always seem to be accurate.
If you can't check out via my site, you can always use PayPal. If neither of those options work, please send an email to email@example.com with the subject Sublime SVN Purchase Request. In the email, be sure to include: the plugin variant (SVN or SVN+SFTP), the quantity and the name and email to license the plugin to. I will send you a site to pay via, and once I have manually confirmed the payment, you license key(s) will be sent out.