My colleague Netnapit has found a cheaper courier service (http://eaglesthai.com/contact-logistics-service/). It is around 2,800baht (insurance not included).
Singapore Customs will tax you for anything above 400SGD (inclusive of the freight charges).
Please let us know if you would like to insure the shipment. This is optional but as this is the first time we are using their service, I would suggest we buy some insurance to cover the shipment.
At a minimum, we can try purchase insurance to cover the value not over 400SGD. Let me know your thoughts.
My colleague (k. Netnapit) will response to you directly on the total shipping cost(with and without insurance) by tomorrow.
Additionally, you requested the staff name to pickup the equipment. Do you have a date in mind, so we can appoint the available staff.