GCMGames via Eneba has Xbox Game Pass Ultimate: 3 Month Subscription (Digital Delivery - Stackable) on sale for around $26.99 when you follow the instructions below:
- Go to product page
- Click on Buy Now.
- Click on "Got discount code?" under "Total Price" and apply discount code XGPUUS
- Proceed to checkout.
- Total price after service/payment fees should be around $26.99