For the annual membership, i think you are saving like 50% compared to Ausi price.
- Buy Amazon India gift cards from eneba
- Sign up for an Amazon India account froma new email. It will ask for a phone number too, but it does NOT have to be an Indian number
- Add the gift cards to Amazon India account via this page
- Turn on India VPN ( I used ExpressVPN)
- Access Prime Video signup page - sign in if needed
- Select the plan and go to checkout - gift card balance will be automatically available
- It will still ask for a billing address, anything you find on the internet will work (don't add random values, it validates state name + zip code)
- Confirm and pay (with gift card balance)
- Turn off VPN and access Prime. Prime content availability changes based on your IP.
Side note #1 : Maybe what I get is the full prime membership, because I see other prime benefits like Amazon Music and Free Delivery
If you in to AU shopping on Prime, then not much worth it as you wont be able ro do that, ends up paying more