Do you plan to clean up that chrome? replace the pedals? How does it ride?
I don't know much about kids bikes, but here in Chicago anyway you'd be lucky to get $15 or $20 for it on Craigslist.
While this one looks kinda cool - especially that chainguard, Murrays were not great bikes even when new. Your competition is a brand new bike of similar department store quality from Target or Wal Mart that sells for $50.