Of course there are other options, but FedEx and USPS are the ones I use. And if you check USPS's website and calculate the postage, you will see that $90 is the cheapest option available. It is cheaper if you choose "Envelope" when calculating the postage, but I don't think you can define 10kg as an envelope. ^^
"Things of the mind left untested by the senses are useless."
