13: Ferrari 275 GTB
Few cars have the distinction of being powered by a V-12 engine and the Ferrari 275 GTB is one of them. At the time, these engines were still being perfected and as such, the Ferrari 275 GTB was not at all a hit like you’d expect. The 275 GTB had a striking design, which was well noted by the automotive press at the time. Likewise, there were high hopes the 275 would perform much better than its predecessor did.
Sadly, the car fell short in a lot of aspects, and this caused frustration in the enthusiast community. The 275 GTB was incredibly fun to drive when it was running right, but repair costs were just too much to live with. The 275 GTB fell short in a lot of aspects and thus the market for these has gone away.