I'm not sure what an oval spine is Gib. Do you have a photo and/or description of what that means?
I think here in a few months Batman 497 will sell really well graded or not, although as you know, you'll get better returns on graded copies.
Indy's CGC Gradings Master Thread - http://tinyurl.com/p45agbh
Want your Comic Graded or Pressed? - http://tinyurl.com/pn74odq
Notify you of new Gradings? - http://tinyurl.com/no58cku