The value of this name is what you have paid. The .co market is not settled yet and therefore the hyped prices do not reflect on the real values of .co names.
Having said that, expired.co is a good name, which can be developed for drop catching names etc.
The first person to own this name gave development a shot and gave up, then put a for sale page on it. Was $250 asking price when I last looked at it. The guy that owns expireddomain.co got a $1xx offer on his name. I believe yours could get a simular offer.