How does shopping agent service charge?

Hippoobuy promise for free shopping agent service.

No more charges except for merchandise charges, international shipping and customs charges (value-added services are available on request)

The total cost of Shopping Agent service= Item cost +International shipping fee+ Customs charges

Item costs = Product price + Domestic shipping fee (from the seller to Hippoobuy warehouse)

International shipping fee: Calculated according to weight, shipping method, and destination

Customs charges: Customs declaration cost for a parcel is generally RMB 8.00 (Depending on the shipping method).