Waaay too many miles. Besides the engine ALL the other components of the car have wear/tear and natural deterioration. What you might 'save' in original pricing probably would be lost in repairs and replacement of hard-to-find parts. There are good-excellent Crossfires to be found. Drive both models, n/a and the SRT6, then start searching for the one that best suits your lifestyle. At 21 the SRT would certainly fill the bill.