8. 1969 Ford Mustang Boss 429
The 1969 Ford Mustang Boss 429 is a true collector’s dream, born from the need to homologate Ford’s potent 429 engine for NASCAR competition. Its racing heritage and unique semi-hemi engine set it apart from other Mustangs.
With fewer than 860 units produced, the Boss 429’s rarity is undeniable. In recent years, values have skyrocketed, with top examples now exceeding $400,000 at prestigious auctions—making it one of the most valuable Mustangs ever built.