Theres an 8000 mile 68 coupe that belonged to the famous Cadillac restorer and collector Lewis Jenkins on Ebay. Thats a once in a lifetime find!
Ebay link.
https://www.ebay.com/itm/1968-Cadillac-DeVille/292469278327?hash=item4418870677:g:JjgAAOSwx4RamdTw&vxp=mtr
added leather and wood trim on side of front seat frames , looked at the car in 2001 in nc