<-- not tested yet, ill test it on trial account, but here's the idea anyways
so GM's can give you back an item that you deleted if you open a ticket for it, but instead of saying you lost something you had, lie to them and say for example "Hey, i lost my Might of Menethil, i deleted it by mistake it was in my bags and i tried to throw a Mana potion and i throwed Might of menethil, can i get it back please?"
now, if they dont keep the items you recieved on your char this will probly work, but if they do keep it, then scam would'nt work :S