I was going to meet the seller of the Gios. On my way on my lunch break, he called and said he brought it to a bike shop and they told him it was "worth about" $2,500. And that was the end of that. Not sure if he took a serious offer or just pulled it.
Had some spare Nuovo derailleurs, new sew ups not mounted. Seemed like a nice guy. Would have have no issue offering more that $400 but there's a bit of a ceiling where I'd go on that bike. Especially since I'm in the process of potentially going custom.