There are many ways you can deal your problem with.
Paypal will not charge extra whether you are receiving amount fro ma verified PP or an un verified PP.
At the same time fee is not related to verified account or un verified account, it is related with the type of account you have.
If the payments you are receiving are processed through credit cards then it is only beneficial that you have a premier account. If the payments are from paypal to paypal you can maintain a verified paypal account. There will be no fee for payments made.