What’s the legal recourse for the poor slob that payed top $$$$ for a vintage Mustang like you said. He could have paid $20-$50k but now is left without anything? THAT would seem like robbery!!!!
Happens a lot.
High end marketeers like Sotheby’s, Barret-Jackson, et al, go to great lengths to verify ownership AND PROVENANCE. If there are any ‘holes’ in the history, NO SALE.
As ALWAYS: CAVEAT EMPTOR................