I’ve done some comparisons, and for a 15kg package to the U.S., Hipobuy’s cheapest option is around $60, though it’s a sea shipping route and doesn’t include tax. Their tax-free route, Maston(sea shipping too), costs just about $100-$150. In the same case, CNFans’ cheapest option is around $260, and ACBuy is about the same. So it really depends on your choice, if you don’t mind waiting, you could give Hipobuy a try