PayPal takes money from the recipeint anyway, and it's a pretty hefty percentage compared to some credit card processors. It doesn't depend on the amount. The merchant rates start at $3,000 and offer a lower percentage, but they still have the transaction fixed-fee. See their rates.

If you are handling a lot of money or lots of smaller transactions, the credit card processors will come out cheape. They usually have a recurring service charge and a set-up fee, but they also take a lower percentage in most cases and PayPal's transaction fee turns out to be higher than a credit card processor's monthly fee. Individual situations will vary based on number of transactions per month, average charge, and total receipts. PayPal does okay for low transaction rates, and credit cards do better for higher rates. PayPal is good for short-term situations where you won't need the service after a couple of months.