Take this with a grain of salt, I'm not old enough to remember the "old days" I'm just going by what I've heard and such.
I've seen a few "rare" cars in that they're rare because they're optioned funny. A big block Ford F100, a diesel K5 blazer, some odd color combination or a nice leather interior with rubber floor mats, etc etc.
You don't see that as much the newer the car gets, because you can't really custom order cars anymore. I heard one time that it took longer to look at the full brochure and options for a 1968 Camaro than it took to build the car.
I thought this up while driving our Chevy Sonic on a delivery today. It's a fleet model, so it's plain white, crank windows, no CD, power locks oddly enough, and an automatic with the manual selector. Got me to thinking "I want this car like this, no frills, just with a manual trans and the turbo engine.
Unfortunately almost all higher performance packages are also looked at as luxury packages. SRT8 chargers are bloated down with heavy wheels, heated leather seats, navigation etc etc. Gimmie that motor without all those heavy additions. GM got its right with the Firebird Formula. Supposedly Ram has a new Express trim that offers the Hemi in a single cab, short wheelbase, crank window, vinyl floor model. A sort of tip-o-the-hat to the Lil Red Express.
I think if you haggled a dealership enough you could get what you really want. Cabbage up front helps, I'm sure, but I just wish I could order a car the way I want to, and it be mine, with little to no chance that there'd be one like it.
Eh, rant over. I'm gonna watch the game. GO CATS!!!