As a current owner of a 2007, I am excited that a 2004 Mazda 3 with 116K on the odo fetches $6300.
No advice for you on the exhaust, I'm not in that demographic.
thanks everyone for all the help and tips! I ended up purchasing a 2004 Mazda3 hatch today with 116k for 6300. Super excited it was everything I was looking for and even has leather seats. Cant wait to throw some mods on there and make it my own! again thanks for all the advice, anyone have any suggestions for a good sounding exhaust I could throw on there that would still pass CA smog checks?