it looks like a very nice deal for $550, if it turns out too big you can certainly make your investment back. I'd say it's one of the later Billato-built Ciocc frames given the semi-fastback seat cluster and internal brake cable, yet not quite a '90s frame since it still has the classic forkcrown and club-pierced BB shell, I'll say late '80s.
edit: I was conflating pics of the other Ciocc (red) with this pink one...I can't really tell what the BB shell looks like, but it still
might have that late-'80s seatcluster and forkcrown