I've only seen one or two bikes labeled as Orbea from the pre-carbon era, they looked ok but not spectacular. This one looks pretty nice with the internal cable routing and braze-on front derailleur mount, too bad there's no matching fork. I'd be very cautious if there are no identifying marks on the frame, panto, etc.
I'm a sucker for chrome frames, but the "handbuilt in the Pyrennes" stuff has me 'ing...
The listing does not say it is Chrome Plated, if that is what you mean. I thought it was too when I first looked. If it is then there is something going on here;
Can this be just a freshly cleaned up bare frame? If that is the case then $400.00 is pretty steep. If there is something wrong with the chrome that I spotted in the picture then it again is much less valuable.
A nice chrome frame could make somone a really pretty bike though. Chrome forks are easy enough to get.