Seller might still have to come down quite a bit further. A partially completed project is a difficult sell in today's market.
Not sure how much you would have to spend to complete, but this fully restored AACA National Award winning 1956 Caribbean convertible did just sell at Mecum Indy for $154K. So maybe you could buy the '55, finish it and still come out ahead.mecum.com/lots/553734/1956-packard-caribbean-convertible/
But the $154K does look like it might be an anomaly in light of other recent '55-'56 Carribean auction sales.