iHerb Delivery Costs from USA to Singapore

Usually, I time my purchase with product discounts and i use Singpost since it's free delivery for orders over S$54.36 which is quite easy to achieve. (see details below)

SingPost — SG$0.00 Free!

Estimated Delivery: April 26, 2016 - May 02, 2016

Flat SG$5.44 - Free for orders over SG$54.36! 
Direct delivery through Singapore Post,
Weight: up to 14 pounds (6350 grams)
Value: up to SG$271.80 OK for P.O. Box
Takes 4-8 business days, with tracking number
Only for consumers, not for re-sellers

DHL — SG$10.87

Estimated Delivery: April 25, 2016 - April 27, 2016

Extra discount for orders over SG$54.36!
Duties and Taxes may be collected at delivery
With tracking, Max 150 lbs (68 kg), No P.O. Box

UPS — SG$13.59

Estimated Delivery: April 25, 2016 - April 29, 2016

Duties and Taxes may be collected at delivery
With tracking, Max 150 lbs (68 kg), No P.O. Box

Customs Information

• If your order value exceeds SGD $400, the entire sum would be subject to Goods and Services Tax (GST).

• Due to the currency exchange rate changing daily, orders with value very close to the tax-free limit may be
  assessed D&T charges, as the currency exchange rate may vary from the order date to the customs clearance date.  

• GST is calculated based on the CIF value of the goods plus all duties payable, and 7% GST gets levied on goods
  imported into Singapore. GST relief is granted on goods (excluding liquor and tobacco products) less than SGD $400.

• Please check with the Singapore Customs www.customs.gov.sg  to see if you can import the items in your order, and
  if any additional licenses or permits are needed.

• Customs may hold orders from Operators/Retailers; if you are an Operator/Retailer, please check with your Customs
  office regarding importing natural products.

• If your package is returned by Customs, due to an incorrect address, or if the whole order is refused; iHerb will refund
  you for the products minus the additional shipping cost to return the order.

• If the cost to return the shipment is greater than the value of the products, your package will be abandoned and no
  refund will be available.