Watch the video:
Timestamps:
0:00 - Explanation
0:27 - Important notes
1:02 - What I'll be doing
1:40 - Adding custom money amounts
2:55 - Proof of concept
3:35 - Successfully adding a custom amount
Previously made a video covering this, though it’s in need of an update with all the info I got around this. This will most likely work for you, as unbelievable as it may be. You can add basically any amount to your Steam Wallet using your card, PayPal or whatever payment method you have available, easily.
The previous video that this one was made to replace: Go to post or View on YouTube