If you walk into a Mercedes showroom, everything is nice, but if you’re lucky enough to see a SLS AMG – you’ll quickly notice it is special. First, look at those gullwing doors! It appears that if you leave them open and gun it, you might actually lift off. When you hear that the car is housing a 563 hp hand-built v8, flight starts to sound reasonable. The interior is complete with all the luxuries you’d expect in a $183k Benz, but this one will hit 0-60 mph in 3.7 seconds. In good condition, the ’50′s version of the car (300 SL) is worth around half a million bucks. Hmm, maybe the SLS AMG is an investment.