I am considering buying a Pruis and trying to decide if used is a sensible thing to do. I want to save the money though it doesn't seem like you save much unless the milage is over 50K. Do people generally consider that significant advancements in the technology have been made as the years have passed? Where can I get listings of the options packages that were offered on the 2003 and 2002 models? What serious advancements have been made with the successive model years? I suspect that lots of people have varying opinions on these questions, but I am willing to hear opinions, so please respond. Thanks.