It wouldn't even let me attempt to buy anything without my bank account attached to the PayPal account. I tried buying something with the $10 first by itself, and it demanded either debit or credit card info.
1) Go to your PayPal account
2) Click on the gear looking thing in the upper right corner (Settings)
3) Click on Payments
4) Scroll down to "Your preferred way to pay"
5) Make sure "Online purchases" is set to "Balance"
6) If not then just click on "Change" to select it
This should work
- Zantra likes this