If I might add, it would be really super nice to someday have the ability to use a different handling fee for each different type of shipping offered, not just international vs domestic. In addition to differences in insurance and processing fees, there can also be a difference in packaging materials. When I use Priority Mail, I don't want to charge any handling fee, because most all of those shipping supplies are free. When I use First Class, a small fee might be in order, as it would mostly be low cost bubble envelopes and small boxes. For Parcel, a slightly larger fee would make sense, since the larger boxes cost more, and if it's fragile, the cost of bubble wrap and other protecting packing can add up quickly.