Using Professional courier is a bad idea. U should regret Ur decision.
In my openion DHL(1),Bludart(2),DTDC(3),TNT(4) are best, U can still ship through "INDIA POST SPEED POST" but the packing should be professional with "Special Seal or tape" so no one try to open it along with a nice address lable(try to make it like a business one with "ebay" logo), individual looking address lables will attract "thiefs" attention.
I buy things outside ebay directly from manufacturers like himalaya,TCL,etc...I always get them through SpeedPost intact, reason is simple they pack in "professional way" with lot of protection and tapes.
There is a seller on ebay who selling special "EBAY" tapes, it should help solving this kind of weired things in happening again. Packing is always important.