I have bad experience with GDex. Took 3 days to deliver.
Never had missing items with Poslaju before, highest value shipped was RM2000. Of course, handphones are very very high temptation for courier handlers.

For high value items its always best to insure it. Doesn't cost that much (relatively).

Just want to state that i did a deal with zer0hour before and although he claimed my item was spoilt in shipping, he returned to me successfully.

if it was not stated that the shipping risks all borne by buyer prior to transfer of money, then my educated guess would be 50-50% split of losses.

Depending on how it turns out then the party suffering the losses should pursue GDex.

I suggest to go public once the tribunal is settled. These companies are dependent on good publicity to make money.