Hemmings?
The Packard Club newsletter(has a classified ad section in the back, wide distribution, seems to be cheap to list).
Cavaliers, granted a 4-door sedan, aren't going for more than $8k unless in pristine running condition, from what I can gather, and have to be in pretty good running condition to even get that.
This one has been advertised for quite a while:
Packard Super Clipper Panam for Sale on Hemmings.This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=246136