At risk of being accused of blasphemy...
The harsh reality is that outside these hallowed halls, the Marauder isn't much more special than any other garden variety special edition car.
It isn't exotic in any way. Rare is a stretch, limited sure.
Take, for example, the BOSS versions of mustangs.
To the enthusiasts, they are great machines and worthy of much admiration and immediately increasing resale values. To the rest of us, it is just another mustang with some extra stuff from the factory.
Marauders? just another Grand Marquis/Crown Vic variant with extra stuff from the factory.
If anyone has visions of rising resale values, I hope they have long pockets to store the vehicle, not drive it much, maintain it regularly, document all the maintenance, get Elvis to drive it and have pictures taken, etc.
Beyond that? The MM is an expensive hobby that has gotten a little cheaper now that there's a gob of them in the 150K+ mile range.
Yes, we all (mostly) want to see our lovely MM's go to good homes. We all also probably want max dollar for the car when we sell it. But the market isn't there for it in big enough numbers to support much more than what this group right here on this board is willing to support.
Problem with this group? There is one... What appears to be a majority here is people who understand cars on a much deeper level than the average person walking on a dealer lot choosing between colors for their next car.
I see most (well, all) members here as shrewd car buyers who know the differences between what a car is worth and what the list/asking price a dealer or private party starts out with.
As for this group being in position to stabilize or increase value? As much as it can, it already has. This group has served the purpose of fanning the flames of enthusiasm and as such has encouraged many folks to keep their cars far longer than the usual life span of ownership. This has limited the churning of the Marauders in the market place.
Outside of that, this group would be among the most difficult to get a premium price paid for an average condition Marauder, with the exception that this group would probably contain those members who might pay a premium for the cherry when it comes available.