If the item is within 500gm - 1000gm, prefered to use private courier service like Gdex. Because within the weight, it only charge RM 8. While PosLaju charge minimum RM 5.20 for first 500gm and addition RM 1 for next 100gm.

So if you send around 1000gm, better use Gdex. I am not so sure about the charges from other private courier service such as SkyNet, because I mostly I post item to East Malaysia where the charges are different.