Hello all, I am new here and looking to buy a Prius and need some feed back. I currently drive a 2006 dually deisel that gets about 13 MPG. I am now driving about 1000 miles per week and want to buy the auto that gets the absolute most MPG. I have always wanted a Prius and will 99% more than likely buy one no matter what. My question is that I see alot of Prius's for sell. I also have been reading many of the threads on here pertaining to battery life and such. Is the reason for the large number of cars for sell is the battery life. Do these need to be replaced after a few years? If I buy a used one, will I have to replace battery's? I know this car will pay for itself compared to what I am driving now and thinking maybe I should just buy a new one. Any thoughts.