DRB II and DRBIII are the computers I know of that the techs use on the OBDII chrysler cars and trucks. DRBIII had a lot more features and stuff it could look at, even had an option for the co-pilot capture system that could capture everything the computer knew when a button was pushed to help in diagnosing intermittent problems. I'm guessing the DRBIIs would be more likely on Ebay right now since the IIIs are still being used quite a bit.