All of the following domains are registered at GoDaddy. Make your best offer; some will go cheaper than others. These are listed at several places. Feel free to PM any private offers.
Car / Automotive related - Racing/Tuning
EclipseNation.com
Import-Blast.com
StreetTunerz.com (looking for a premium price on this one)
Car / Automotive related - Low Riders
ImpalaBuilder.com
ImpalaTalk.com
LayItLow.net
LayItLow.org
LowRidersOnline.com (looking for a premium price on this one)