Read the guild notice in the screenshot below, it explains everything.
Not in the mood to type twice, typed once in the guild notice :P .
So people, always look at the bottom of the item for the timer before buying an item that you believe is super, otherwise you might regret it 30 minutes later.
Sadly i did not take a screen of the item with timer, but the next time i find another i will, and gonna post it here.