Humble VR Bundle is crazy good value (all Steam keys):
$1 tier:
Price histories: https://isthereanydeal.com/specials/#/filter:id/8390
$1 tier:
- Cosmic Trip + OST
- Smashbox Arena
- Budget Cuts
- GORN + OST
- Space Pirate Trainer + OST
- Moss
- Superhot VR
Price histories: https://isthereanydeal.com/specials/#/filter:id/8390