Atala made nice bikes, and I like them a lot.
Unfortunately, Atala did not make bikes that would be considered 'high end' in today's market, which is somewhat depressed.
My best price estimate is $750 as is, if you can get that, take it and walk away. My guess is that you would not receive an offer that high, even on eBay, and with their 10% fee, you're really looking at $675 plus the hassle of shipping.
If you're willing to put up with shipping multiple small parts, you might be ale to better that number by parting out the bike and frame.