Will this special edition become valuable in the future, or will it be viewed as no better than a standard Mustang GT?

It's hard to believe that the sixth-generation S550 Mustang debuted back ... Depending on the trim you went with, the body got beefier, with stuff like a body kit, and functional aero components.

Roush’s tuning package for the Mustang S550 also features a full body kit and a modified suspension, plus an upgraded cooling system for the engine. It also comes with a set of 20-inch wheels ...