Yes they are.......

My 89 black Dodge-Cummins 4wd 5 speed gets a lot of attention whenever I take it out.
It would appear that it's now worth more than when I bought it over 22 years ago.

Hagerty didn't blink when I insured it for 14k.

Jim

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14 E250 BlueTEC black. 45k miles
95 E320 Cabriolet Emerald green 66k miles
94 E320 Cabriolet Emerald green 152k miles
85 300TD 4 spd man, euro bumpers and lights, 15" Pentas dark blue 274k miles