I've bought watch straps that were delivered to my doorstep with no GST, but had a low declared value.
A friend of mine bought some bike accessories; should not have been charged GST, but he was as customs decided to lump product price along with shipping fees (which brought it to just a smidgen over RM500 iirc). He had to waste another 2 hours trying to reason with the guy behind the counter that he shouldn't be charged any fees or GST; this was at the Pos Malaysia office next to LCCT.
At the end of the day, he did manage to convince the people there. It seems that this GST mumbo jumbo is at their own discretion.
If I am paying for postal charges, I expect it to be delivered to my freaking doorstep. At no point do I expect to either travel all the way to LCCT to pay the fees and pick up the item manually, nor do I expect to pay an agent freaking fee to have them handle my package and then for me to manually pick it up from their HQ in KL Sentral area. For me, that is BS- delivering to my doorstep is their bloody job!! That, and then they need to standardize this rubbish GST fee structure, and make it public knowledge.