function Trig_sell_Actions takes nothing returns nothing
if  GetItemTypeId(GetSoldItem())=='texp' then
    call UnitAddAbility(GetBuyingUnit(),'ACs8')
    endif
endfunction

//===========================================================================
function InitTrig_sell takes nothing returns nothing
local trigger trig=CreateTrigger()
     local integer index=0
     loop
         call TriggerRegisterPlayerUnitEvent(trig, Player(index), EVENT_PLAYER_UNIT_SELL_ITEM, null)
         set index = index + 1
         exitwhen index == bj_MAX_PLAYER_SLOTS
     endloop
      
     call TriggerAddAction(trig, function Trig_sell_Actions )
endfunction