I am doing a lot of research on challengers and I am interested with either the scat pack or srt 392. The srt is too expensive for me new at around 50 K or about 10K more than the scat pack. Used the price seems more in my range. I see some on carmax and such with low miles but am concerned with seriously considering them. I am worried that the previous owner might have beat it up or done some bad mods on it. I have never bought a used car before and it seems this is might be a bad time to start. How would I even check for these things in a used srt? I would only buy from a big place like carmax and not a private seller or some small used car lot. Also why would someone get rid of a srt with very low miles? Does this indicate a serious problem with the car? Thanks.