Hi there have an June 01 740IL with premium DSP. I was thinking about redoing the Head Unit but know that i would have to replace nav/amp/CD cahnger and all speakers if i do. So i just wanted to know what the going rate is for great condition DSP/AMP, wide screen Factiry head unit, and CD changer? If i do decide to upgrade then i will sell off facotry equipment just wanted an idea of what i would be getting back?

Any feed back opinions would be helpful. was thinking pioneer AVIC-Z110BT and JL components and amp.

Thanks in advance.