When something is selling for that low, it's usually not worth it to get it graded considering the cost involved and, more importantly now, the time it takes to get back. By the time you get a slab back (six months or so?), the market may have cooled on that particular book. Things are really volatile as buyers and sellers hop onto the "new big thing", especially with comics that have become hot due to appearances in Marvel shows. It's best to wait a bit, keep what you consider a good investment bagged and boarded and safe, and wait until it's proven its worth to be stable.