2. Mercedes 450 SLC
Debuting a year after the SL roadster, the SLC was a popular GT car that shared most of the engines, design, and interior with the SL. However, it provided much more comfort, better ride quality, and driving refinement. Despite the fact they offered it with smaller engines, for a more than solid performance, you want either the 450 SLC V8 producing 225 HP or the 500 SLC V8 with 245 HP.
They offered the SLC coupe for 10 years, from 1971 to 1981, producing over 62,000 of them. But those who can’t afford the SL models are turning to the SLC. And so the higher demand is making them more expensive.