So, you've decided a used G-wagon is calling your name ... Limited-run AMGs, like the six-wheeled G63 6x6 or the G650 Landaulet, are already fetching stupid money on the collector market.

Looking at today's Mercedes G-Wagon, it's tough to picture how utilitarian ... That's still not enough for the XLP 800 6x6 Adventure, which Brabus-izes those running boards into electronically ...