Is receiving money to my Paypal business account from multi vendor shop free?

[yuppi]

I'm selling used stuff (books, clothes) on this multivendor site and I need to use my Paypal business account to receive money from the sales. It's the only option on the site. The Paypal help page says that receiving money is free only from your family. I already pay commission to the site but do I need to pay commission also to Paypal to receive the money from the shop?

[kernowlass]

@yuppi 

Yes, thats how paypal fund the service that they provide for you and pay their staffs wages.