Not that high in my opinion, $5 - $8 maybe. Then again, mine isn't either.
It seems only accounts with nulgath / rares sell for a good price.
With all do respect, that's EXTREMELY underpriced. Rares get more costly depending on their date, he has stuff from 2008, AND founder. The MINIMUM he can get is 20, the maximum, I honestly don't know. That's a nice account btw, would you care to trade it @Vectrex ?