Being digital, very unlikely they will have sold out. :)
As for PayPal, try this ...
Some of you have contacted us wishing VHX had different payment options. While they don’t support PayPal at this time, we’ve created a way for those without access to a credit card to purchase the bundles via PayPal.
1) Go to http://gumroad.com/CarmillaOfficial
2) Select the bundle you want, and click “pay with PayPal” at checkout.
3) You will be sent a generated coupon code to use on the Carmilla VHX site