Free Car audio what should i get?

I put a Custom Autosound USA1 in my car a few years back. Still like it pretty well as it has aux inputs on the back that can be adapted to a plug for an MP3 player. If I remember correctly it was rated at 50 WPC X4 (probably PMP) but it will cleanly drive two pair of Boston Acoustics component loudspeaker setups with volume enough to hear above the Borla exhaust. It also has pre-out if you want additional amps. If you can get that sort of thing it might be one to consider.