The edit option is only temporary for the members. After a limited number of days only admin staff is able to take that step. However, we are happy to help out at any time.
In the case of classified's, our preference is to mark something as SOLD, rather than delete the thread. It is encouraging and informative to other members who are looking to sell a similar item and it helps them set a reasonable price on their own ad if they can see where others have sold.
Simply send one of us a private message and we will take care of it.