Not if you are selling on ebay, but you can do it (I do it every week) if you are sending money to someone else. For example, I pay for my daughter's figure skating lessons each week via Paypal. I just log into paypal, click on the "send money" link, enter the email where I'm sending it, click on "personal" and then click on "other" and the transaction is free to the person receiving the money.
Sometimes I send my mom money for things and just do it via Paypal the same way so she doesn't have any fees taken out of what I send her. She gets the amount in full with no fees.
The one catch is you can't send or receive money that comes from a credit card. It has to be a debit card transaction where paypal deducts the money from your checking account, or from funds that are already in your paypal account.