Hi Craig,
Unfortunately I can't make out a great deal of detail from the photographs so the following comments should be taken in that context.
For me, I don't think that the tang or file marks are well done. Also, though it might be a shadow on the photograph, I think I can see ubu-ha (the portion of blade near the nakago is sometimes left unsharpened on a sword's initial polish) and this would indicate that this is not an old blade. These points would indicate either a fake or at best a war-time blade to me.
Furthermore, the kissaki looks to be in a poor state: whoever did the polish looks from the photographs to have messed up the geometry as the ko-shinogi does not run parallel to the edge of the blade at the tip. This too is reminiscent of the Chinese fakes that one sees and might be another point to put you on your guard.
Hope that helps, I'm sure you'll get some other and probably better advice shortly.
Best regards,