shipping extra or included?

Raise the price 4% and don't add in paypal fees.

That's called "passing it along to the consumer", and is how big business works.

The perception is better on the buyers end.

Protects both teams. I just did a transaction and covered it. Burry it in the cost, make it a requirement, however you get there. Paypal is a necessity IMO because of the way people are today, sad to say.

JW