No, not always. There is a wide range of ways to pay on eBay and most sellers offer more than one option. Look at the auction page under "Payment methods accepted", here the seller stipulates which payment options they prefer to use.

- PayPal
- Credit Card
- Personal or Cashier's Checks
- Money Orders (including Bid Pay)
- Escrow
- Bank to Bank Wire Transfer
- Instant Cash Wire Transfers (not recommended by eBay)
- Cash (not recommended by eBay)