Why are sellers continuing to use the Global shipping program when it is a blatant rip off and is hurting their prospects of overseas sales? 
I live in Australia and collect a well known English brand product.
Lately, I have been buying less as sellers are sending them by the GSP which charges up to nearly 3 times what the same item would cost via Royal Mail international tracked and signed for air mail. 

For example, I recently looked at a part I needed which weighed only a few grams. The part would have cost me £45 and for it to be sent via GSP would have set me back another £25.92 + an “import charge” of £8.85 bringing the total cost to £79.77

To send it via Royal Mail international tracked would have cost £10.80 and, with the value being under £100, no import charge making the total to me £55.80. 
I have already seen complaints on this forum about Ebay taking a fair amount in fees from seller for the postage and leaving them out of pocket as well. It would seem that the only advantage of the GSP is to Ebay and no one else. 
I hope that more sellers will see the GSP for what it really is and dump it. It would greatly benefit all.