"Hey Thomas, you know a lot about stereo systems right? What would it take for me to get a line in for my car stereo so I can use my mp3 player? I have an aftermarket radio (not sure the model, but I can look it up). Are we talking like $100+? I'm trying to decide if I want to do it now or wait until after the summer." My buddy just sent that to me on facebook.... dont know how to answer dat question....i never had to solve that problem....