hello everyone i just bought these amps from e bay the 300 was brand new i think? when i opened it had no serial # my 1000 was used and had a serial # is there a differance from refurbished to used and getting ripped off also how do i remove stock radio from 2003 honda accord ex i didnt really want to pry the face with a screw driver as i read on some other post thanks i really appreciate your guys help love this forum